AVERAGE MONTHLY SEA LEVEL BAROMETRIC PRESSURE (INCHES OF MERCURY) Based on daily average sea level pressure from reporting ASOS locations. Data is preliminary and may contain errors. Source: National Climatic Data Center ALASKA STATION | Years | Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec | Year ANCHORAGE-LAKE HOOD SEAPLANE (PALH) | 1998-2011 | 30.09 30.11 30.06 30.03 29.99 29.96 29.95 29.96 29.99 29.97 29.93 30.12 | 30.01 ANCHORAGE-MERRILL FIELD AP (PAMR) | 1997-2011 | 30.08 30.11 30.05 30.02 29.99 29.95 29.94 29.96 29.99 29.97 29.95 30.16 | 30.01 ANCHORAGE-TED STEVENS INT AP (PANC) | 1996-2011 | 30.08 30.08 30.03 30.02 30.00 29.94 29.94 29.96 29.99 29.97 29.92 30.11 | 30.00 ANNETTE ISLAND AIRPORT (PANT) | 1996-2011 | 30.10 30.13 30.04 30.02 30.03 30.03 30.06 30.03 30.02 30.04 30.03 30.15 | 30.06 BARROW-WILL ROGERS MEM AP (PABR) | 1996-2011 | 30.14 30.11 30.23 30.10 30.11 30.01 29.98 29.94 30.02 29.97 29.99 30.14 | 30.06 BETHEL AIRPORT (PABE) | 1996-2011 | 30.14 30.09 30.08 30.05 30.00 29.96 29.94 29.99 29.98 29.91 30.01 30.10 | 30.02 BETTLES AIRPORT (PABT) | 1996-2011 | 30.15 30.10 30.11 30.02 30.02 29.89 29.88 29.94 29.98 29.96 30.00 30.10 | 30.01 COLD BAY AIRPORT (PACD) | 1996-2011 | 30.09 30.24 30.10 30.09 30.04 29.97 30.00 30.02 30.00 30.00 30.08 30.20 | 30.07 CORDOVA-M.K. SMITH AP (PACV) | 1996-2011 | 30.08 30.05 30.06 30.03 30.03 30.00 29.99 29.96 30.01 29.92 29.91 30.10 | 30.01 DEADHORSE AIRPORT (PASC) | 1999-2011 | 30.12 30.12 30.19 30.08 30.08 29.97 29.95 29.94 30.05 29.96 30.01 30.13 | 30.05 DEERING AIRPORT (PADE) | 1998-2010 | 30.11 30.03 30.14 30.05 30.04 29.92 29.89 29.94 29.97 29.94 29.99 30.08 | 30.01 DEERING AIRPORT (PADE) | 1998-2011 | 30.09 30.03 30.11 30.04 30.03 29.91 29.89 29.94 29.97 29.90 29.98 30.03 | 29.99 DELTA JCT/FT GREELY AF (PABI) | 1996-2011 | 30.19 30.10 30.11 30.02 30.00 29.91 29.91 29.96 30.02 29.99 30.00 30.12 | 30.03 EAGLE AIRPORT (PAEG) | 1998-2011 | 30.19 30.09 30.13 30.02 29.97 29.89 29.90 29.91 30.01 29.97 30.01 30.14 | 30.02 FAIRBANKS INTERNATIONAL AP (PAFA) | 1996-2011 | 30.16 30.10 30.09 30.02 29.98 29.90 29.89 29.94 30.00 29.98 29.98 30.12 | 30.01 GULKANA AIRPORT (PAGK) | 1996-2011 | 30.19 30.11 30.07 30.01 30.01 29.92 29.91 29.93 30.00 29.93 30.01 30.12 | 30.02 HAINES (PAHN) | 1998-2011 | 30.14 30.10 30.07 30.02 30.02 30.00 30.01 29.98 30.03 29.98 29.97 30.17 | 30.04 HOMER AIRPORT (PAHO) | 1996-2011 | 30.04 30.03 30.05 30.05 30.01 29.97 29.96 29.98 29.96 29.96 29.93 30.15 | 30.01 ILIAMNA AIRPORT (PAIL) | 1998-2011 | 30.11 30.09 30.04 30.07 30.00 29.96 29.96 29.96 29.98 29.95 29.97 30.18 | 30.02 JUNEAU INTERNATIONAL AIRPORT (PAJN) | 1996-2011 | 30.11 30.08 30.03 30.01 30.02 30.01 30.02 29.99 30.03 30.02 29.98 30.14 | 30.04 KALTAG AIRPORT (PAKV) | 1998-2011 | 30.14 30.09 30.09 30.04 30.01 29.93 29.93 29.97 29.99 29.97 29.98 30.09 | 30.02 KENAI MUNICIPAL AIRPORT (PAEN) | 1996-2011 | 30.07 30.05 30.02 30.00 30.00 29.96 29.95 29.96 29.95 29.93 29.92 30.10 | 29.99 KETCHIKAN INTL AIRPORT (PAKT) | 1997-2011 | 30.10 30.13 30.04 30.03 30.03 30.03 30.06 30.03 30.03 30.05 30.04 30.13 | 30.06 KING SALMON AIRPORT (PAKN) | 1996-2011 | 30.15 30.10 30.04 30.06 29.97 29.96 29.92 29.97 29.96 29.91 30.00 30.16 | 30.02 KIVALINA AIRPORT (PAVL) | 1998-2011 | 30.13 30.07 30.09 30.02 30.02 29.90 29.88 29.96 29.96 29.93 29.96 30.09 | 30.00 KLAWOCK AIRPORT (PAKW) | 1998-2011 | 30.11 30.09 30.04 30.01 30.03 30.02 30.04 30.00 30.04 30.07 30.01 30.13 | 30.05 KODIAK AIRPORT (PADQ) | 1996-2011 | 30.13 30.05 30.04 30.04 29.99 29.96 29.94 29.99 29.99 29.93 30.00 30.24 | 30.03 KOTZEBUE-RALPH WIEN MEM AP (PAOT) | 1996-2011 | 30.09 30.06 30.11 30.03 30.01 29.91 29.88 29.93 29.98 29.92 29.97 30.09 | 30.00 MC GRATH AIRPORT (PAMC) | 1996-2011 | 30.12 30.07 30.07 30.03 29.98 29.93 29.91 29.97 29.96 29.93 29.98 30.07 | 30.00 NENANA MUNICIPAL AIRPORT (PANN) | 1998-2011 | 30.15 30.08 30.09 30.01 29.99 29.90 29.89 29.95 30.00 29.95 29.98 30.09 | 30.01 NOME AIRPORT (PAOM) | 1996-2011 | 30.11 30.08 30.08 30.02 29.98 29.92 29.90 29.95 29.94 29.92 29.92 30.04 | 29.99 NORTHWAY AIRPORT (PAOR) | 1996-2011 | 30.19 30.15 30.11 30.01 29.99 29.91 29.89 29.92 30.01 30.00 30.03 30.17 | 30.03 NUIQSUT AIRPORT (PAQT) | 1998-2011 | 30.16 30.12 30.17 30.10 30.10 29.98 29.96 29.96 30.04 29.97 30.01 30.16 | 30.06 PALMER MUNICIPAL AIRPORT (PAAQ) | 1997-2011 | 30.10 30.10 30.05 30.02 29.99 29.95 29.95 29.96 30.02 29.98 29.93 30.15 | 30.02 PORTAGE GLACIER (PATO) | 1998-2011 | 30.07 30.05 30.01 30.02 30.01 29.96 29.98 29.96 29.99 29.98 29.90 30.15 | 30.01 SELDOVIA AIRPORT (PASO) | 1997-2011 | 30.04 30.02 30.06 30.04 30.01 29.97 29.95 29.98 29.98 29.94 29.98 30.19 | 30.01 SEWARD AIRPORT (PAWD) | 1997-2011 | 30.11 30.10 30.05 30.05 30.02 29.97 29.96 29.99 30.02 29.98 29.94 30.18 | 30.03 SITKA ROCKY GUTIERREZ ARPT (PASI) | 1996-2011 | 30.15 30.11 30.05 30.03 30.03 30.02 30.04 30.01 30.04 30.02 30.01 30.13 | 30.05 SKAGWAY AIRPORT (PAGY) | 1996-2011 | 30.12 30.13 30.10 30.01 30.00 29.97 29.99 29.96 30.01 29.99 30.00 30.18 | 30.04 ST PAUL ISLAND AIRPORT (PASN) | 1996-2011 | 30.15 30.30 30.17 30.10 30.05 29.96 29.97 30.01 29.99 30.03 30.13 30.13 | 30.08 ST. GEORGE AIRPORT (PAPB) | 1996-2010 | 30.25 30.33 30.24 30.15 30.07 29.95 29.96 30.02 30.02 30.02 30.19 30.27 | 30.12 ST. GEORGE AIRPORT (PAPB) | 1996-2011 | 30.16 30.30 30.18 30.12 30.04 29.93 29.96 30.02 30.02 29.98 30.14 30.23 | 30.09 TALKEETNA AIRPORT (PATK) | 1996-2011 | 30.10 30.12 30.06 30.03 30.01 29.95 29.95 29.96 29.99 29.99 29.94 30.11 | 30.02 TANANA-RALPH M CALHOUN ARPT (PATA) | 1999-2011 | 30.15 30.09 30.08 30.01 29.99 29.90 29.88 29.92 29.95 29.95 29.97 30.09 | 30.00 WAINWRIGHT AIRPORT (PAWI) | 1998-2011 | 30.13 30.08 30.15 30.10 30.06 29.95 29.95 29.92 29.98 29.94 29.99 30.11 | 30.03 YAKUTAT AIRPORT (PAYA) | 1996-2011 | 30.09 30.10 30.06 30.04 30.02 30.01 30.02 29.98 30.01 30.01 29.97 30.17 | 30.04 ARIZONA STATION | Years | Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec | Year BISBEE DOUGLAS INTL ARPT (KDUG) | 1996-2011 | 30.05 29.99 29.92 29.86 29.81 29.79 29.85 29.88 29.86 29.91 30.00 30.06 | 29.92 FLAGSTAFF PULLIAM AIRPORT (KFLG) | 1996-2011 | 30.12 30.06 30.00 29.94 29.90 29.90 29.98 30.01 29.99 30.02 30.10 30.12 | 30.01 FORT HUACHUACA-PIONEER AF (KALK) | 2008-2011 | 30.04 29.95 29.88 29.83 29.79 29.78 29.84 29.84 29.85 29.90 29.96 29.98 | 29.89 GRAND CANYON NATL PARK APT (KGCN) | 1996-2011 | 30.16 30.09 30.03 29.96 29.92 29.91 29.97 30.00 29.99 30.06 30.13 30.16 | 30.03 KINGMAN AIRPORT (KIGM) | 1996-2011 | 30.04 29.99 29.92 29.85 29.78 29.79 29.78 29.79 29.81 29.89 29.98 30.05 | 29.89 NOGALES INTERNATIONAL ARPT (KOLS) | 1999-2011 | 30.03 29.99 29.93 29.87 29.82 29.79 29.87 29.88 29.85 29.90 29.99 30.03 | 29.91 PAGE MUNICIPAL AIRPORT (KPGA) | 1997-2011 | 30.15 30.07 29.97 29.89 29.84 29.84 29.83 29.86 29.89 29.98 30.08 30.15 | 29.96 PHOENIX DEER VALLEY ARPT (KDVT) | 1998-2011 | 30.04 29.99 29.92 29.85 29.77 29.75 29.77 29.78 29.77 29.86 29.98 30.04 | 29.88 PHOENIX SKY HARBOR INTL AP (KPHX) | 1996-2011 | 30.05 30.00 29.92 29.87 29.78 29.76 29.77 29.79 29.77 29.86 29.98 30.05 | 29.88 PRESCOTT-ERNEST A. LOVE AP (KPRC) | 1996-2011 | 30.09 30.02 29.95 29.90 29.83 29.82 29.88 29.90 29.89 29.95 30.04 30.08 | 29.95 SAFFORD REGIONAL AIRPORT (KSAD) | 1998-2011 | 30.07 30.01 29.92 29.86 29.78 29.78 29.81 29.83 29.82 29.90 30.01 30.08 | 29.91 SCOTTSDALE AIRPORT (KSDL) | 2001-2011 | 30.05 30.00 29.93 29.86 29.79 29.74 29.78 29.79 29.79 29.87 29.98 30.05 | 29.89 SIERRA VISTA-LIBBY AAF AP (KFHU) | 2006-2011 | 30.03 29.99 29.94 29.87 29.83 29.83 29.90 29.90 29.90 29.94 30.00 30.04 | 29.93 ST JOHNS INDUS AIRPK ARPT (KSJN) | 1999-2011 | 30.12 30.03 29.96 29.87 29.82 29.81 29.87 29.91 29.91 29.97 30.07 30.12 | 29.96 TUCSON INTERNATIONAL AIRPORT (KTUS) | 1996-2011 | 30.04 30.00 29.93 29.88 29.80 29.77 29.82 29.84 29.81 29.89 29.99 30.05 | 29.90 WINDOW ROCK AIRPORT (KRQE) | 1998-2011 | 30.14 30.05 29.98 29.91 29.86 29.84 29.88 29.93 29.95 30.00 30.10 30.13 | 29.98 WINSLOW-LINDBERGH REGIONAL P (KINW) | 1996-2011 | 30.17 30.09 30.00 29.92 29.85 29.83 29.87 29.92 29.92 30.00 30.11 30.17 | 29.99 YUMA MCAS (KNYL) | 1996-2011 | 30.05 30.01 29.96 29.86 29.80 29.75 29.75 29.74 29.76 29.88 29.98 30.06 | 29.88 CALIFORNIA STATION | Years | Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec | Year ALTURAS MUNICIPAL AIRPORT (KAAT) | 1998-2011 | 30.19 30.10 30.07 30.00 29.98 29.95 29.96 29.96 29.99 30.08 30.15 30.18 | 30.05 ARCATA AIRPORT (KACV) | 1996-2011 | 30.15 30.09 30.13 30.09 30.07 30.05 30.02 30.01 30.00 30.06 30.13 30.12 | 30.08 AVALON-CATALINA AIRPORT (KAVX) | 2000-2011 | 30.08 30.05 30.02 29.99 29.94 29.90 29.90 29.89 29.87 29.94 30.03 30.08 | 29.97 BAKERSFIELD-MEADOWS FIELD AP (KBFL) | 1996-2011 | 30.14 30.08 30.04 29.99 29.92 29.85 29.85 29.86 29.85 29.96 30.08 30.14 | 29.98 BARSTOW-DAGGETT AIRPORT (KDAG) | 1996-2011 | 30.11 30.03 29.97 29.89 29.82 29.78 29.79 29.80 29.83 29.92 30.05 30.11 | 29.92 BISHOP AIRPORT (KBIH) | 1996-2011 | 30.12 30.03 29.97 29.90 29.85 29.83 29.85 29.86 29.89 29.99 30.07 30.13 | 29.96 BLUE CANYON - NYACK ARPT (KBLU) | 1996-2011 | 30.10 30.05 30.03 29.99 29.93 29.88 29.88 29.88 29.88 29.97 30.06 30.09 | 29.98 BLYTHE AIRPORT (KBLH) | 1996-2011 | 30.08 30.01 29.94 29.86 29.78 29.75 29.75 29.76 29.78 29.87 30.00 30.08 | 29.89 BURBANK-GLENDALE-PASA ARPT (KBUR) | 1998-2011 | 30.06 30.03 29.99 29.96 29.91 29.87 29.88 29.87 29.85 29.92 30.01 30.07 | 29.95 CAMARILLO AIRPORT (KCMA) | 1999-2011 | 30.11 30.07 30.05 30.01 29.96 29.93 29.94 29.93 29.91 29.97 30.06 30.11 | 30.00 CAMP PENDLETON-MCAS (KNFG) | 2006-2011 | 30.06 30.07 30.05 29.99 29.94 29.91 29.90 29.87 29.88 29.96 30.03 30.08 | 29.98 CAMPO (KCZZ) | 1998-2011 | 30.03 30.00 29.95 29.93 29.88 29.84 29.86 29.85 29.84 29.91 29.99 30.04 | 29.93 CARLSBAD-MCCLELLAN-PLMR AP (KCRQ) | 1998-2011 | 30.07 30.05 30.01 29.99 29.94 29.91 29.91 29.90 29.87 29.94 30.02 30.08 | 29.98 CHINA LAKE (KNID) | 2007-2011 | 30.13 30.03 29.98 29.88 29.82 29.77 29.78 29.79 29.84 29.96 30.06 30.10 | 29.93 CHINO AIRPORT (KCNO) | 1998-2011 | 30.10 30.06 30.02 29.99 29.94 29.90 29.91 29.90 29.88 29.95 30.04 30.10 | 29.98 CONCORD-BUCHANAN FIELD (KCCR) | 1999-2011 | 30.12 30.03 30.03 29.99 29.93 29.87 29.87 29.87 29.86 29.96 30.06 30.10 | 29.98 CRESCENT CITY-MCNAMARA AP (KCEC) | 2000-2011 | 30.14 30.07 30.13 30.08 30.07 30.04 30.01 30.00 30.00 30.06 30.13 30.11 | 30.07 EL CENTRO-NAF (KNJK) | 2006-2011 | 30.11 30.06 30.01 29.92 29.84 29.78 29.77 29.77 29.80 29.93 30.03 30.12 | 29.93 EUREKA-WOODLEY ISLAND (KEKA) | 1996-2008 | ##### ##### ##### ##### ##### ##### ##### ##### ##### ##### ##### ##### | ##### FRESNO YOSEMITE INTL AP (KFAT) | 1996-2011 | 30.16 30.09 30.05 30.00 29.93 29.86 29.86 29.86 29.86 29.97 30.10 30.16 | 29.99 FULLERTON MUNICIPAL ARPT (KFUL) | 1998-2011 | 30.08 30.05 30.01 29.98 29.93 29.90 29.90 29.89 29.87 29.94 30.02 30.08 | 29.97 HANFORD MUNICIPAL AIRPORT (KHJO) | 1998-2011 | 30.17 30.10 30.06 30.01 29.94 29.87 29.87 29.87 29.87 29.98 30.12 30.17 | 30.00 HAWTHORNE AP(KHHR) | 1998-2011 | 30.09 30.06 30.03 29.99 29.94 29.91 29.92 29.91 29.88 29.95 30.04 30.09 | 29.98 HAYWARD EXECUTIVE AIRPORT (KHWD) | 1998-2011 | 30.17 30.10 30.11 30.07 30.03 29.98 29.98 29.97 29.95 30.03 30.13 30.17 | 30.06 IMPERIAL BEACH-NAVAL AUX (KNRS) | 1996-2011 | 30.07 30.05 30.05 30.00 29.96 29.92 29.92 29.90 29.88 29.97 30.01 30.08 | 29.98 IMPERIAL COUNTY AIRPORT (KIPL) | 2000-2011 | 30.07 30.01 29.94 29.87 29.79 29.74 29.75 29.76 29.76 29.86 29.99 30.07 | 29.89 LANCASTER-FOX FIELD (KWJF) | 1996-2011 | 30.17 30.09 30.04 29.97 29.90 29.85 29.87 29.88 29.89 29.98 30.10 30.15 | 29.99 LEMOORE NAVAL AIR STATION (KNLC) | 2006-2011 | 30.14 30.08 30.09 30.01 29.93 29.87 29.84 29.84 29.87 29.99 30.09 30.15 | 29.99 LIVERMORE MUNICIPAL ARPT (KLVK) | 1998-2011 | 30.14 30.07 30.07 30.03 29.97 29.92 29.92 29.91 29.89 29.99 30.10 30.14 | 30.01 LONG BEACH-DAUGHERTY FLD (KLGB) | 1996-2011 | 30.08 30.05 30.02 29.99 29.94 29.91 29.91 29.90 29.87 29.95 30.03 30.08 | 29.98 LOS ANGELES INTL AP (KLAX) | 1996-2011 | 30.08 30.05 30.02 29.99 29.95 29.91 29.92 29.91 29.88 29.95 30.03 30.09 | 29.98 LOS ANGELES-USC CAMPUS (KCQT) | 1996-2011 | 30.08 30.05 30.02 29.99 29.93 29.90 29.91 29.90 29.88 29.94 30.03 30.08 | 29.97 MADERA MUNICIPAL AIRPORT (KMAE) | 1998-2011 | 30.16 30.08 30.06 30.00 29.93 29.86 29.86 29.86 29.87 29.97 30.10 30.15 | 29.99 MARYSVILLE-YUBA COUNTRY AP (KMYV) | 2000-2011 | 30.16 30.08 30.06 30.01 29.94 29.88 29.86 29.87 29.88 29.98 30.11 30.14 | 30.00 MERCED MUNI/MACREADY FLD APT (KMCE) | 1998-2011 | 30.16 30.08 30.06 30.00 29.93 29.87 29.86 29.87 29.86 29.97 30.10 30.15 | 29.99 MIRAMAR-MCAS (KNKX) | 2007-2011 | 30.05 30.04 30.03 29.98 29.94 29.91 29.90 29.87 29.87 29.95 30.01 30.06 | 29.97 MODESTO CTY-CO H SHAM FD APT (KMOD) | 1998-2011 | 30.16 30.08 30.06 30.01 29.94 29.87 29.87 29.87 29.87 29.98 30.10 30.15 | 30.00 MONTAGUE-SISKIYOU COUNTY AP (KSIY) | 2001-2011 | 30.23 30.14 30.11 30.05 30.02 29.99 29.97 29.97 30.01 30.10 30.19 30.18 | 30.08 MONTEREY AIRPORT (KMRY) | 1998-2011 | 30.17 30.12 30.12 30.10 30.06 30.01 30.01 30.00 29.97 30.04 30.13 30.17 | 30.08 MOUNT SHASTA (KMHS) | 1996-2011 | 30.21 30.14 30.11 30.07 30.04 30.00 30.01 30.02 30.03 30.12 30.18 30.22 | 30.10 MOUNTAIN VIEW-MOFFETT FIELD (KNUQ) | 1996-2011 | 30.16 30.10 30.10 30.06 30.01 29.96 29.96 29.96 29.93 30.02 30.11 30.15 | 30.04 NAPA COUNTY AIRPORT (KAPC) | 1998-2011 | 30.12 30.05 30.04 30.00 29.95 29.90 29.90 29.90 29.88 29.97 30.07 30.11 | 29.99 NEEDLES AIRPORT (KEED) | 2001-2011 | 30.07 30.00 29.91 29.83 29.77 29.79 29.73 29.72 29.78 29.86 29.98 30.07 | 29.87 NORTH AUX AF EDWARDS AFB (K9L2) | 2007-2011 | 30.34 30.11 30.12 29.98 29.87 29.81 29.82 29.82 29.87 29.98 30.07 30.12 | 29.99 OAKLAND INTL AIRPORT (KOAK) | 2000-2011 | 30.15 30.08 30.09 30.06 30.01 29.96 29.96 29.95 29.94 30.01 30.11 30.13 | 30.04 OCEANSIDE MUNICIPAL ARPT (KOKB) | 1999-2011 | 30.08 30.05 30.03 30.00 29.95 29.91 29.91 29.90 29.88 29.95 30.03 30.08 | 29.98 ONTARIO INTERNATIONAL ARPT (KONT) | 1998-2011 | 30.08 30.05 30.00 29.97 29.91 29.87 29.87 29.86 29.84 29.93 30.02 30.08 | 29.96 OROVILLE MUNICIPAL AIRPORT (KOVE) | 1998-2011 | 30.17 30.09 30.07 30.01 29.95 29.88 29.88 29.89 29.89 29.99 30.11 30.16 | 30.01 OXNARD AIRPORT (KOXR) | 1998-2011 | 30.09 30.06 30.02 29.99 29.95 29.91 29.92 29.91 29.88 29.95 30.04 30.09 | 29.98 PALM SPRINGS INTL AIRPORT (KPSP) | 1998-2011 | 30.08 30.02 29.94 29.89 29.80 29.76 29.77 29.78 29.77 29.88 30.00 30.08 | 29.90 PALMDALE AIRPORT (KPMD) | 1998-2011 | 30.12 30.05 30.00 29.94 29.88 29.83 29.85 29.85 29.86 29.95 30.07 30.13 | 29.96 PASO ROBLES MUNICIPAL ARPT (KPRB) | 1996-2011 | 30.14 30.07 30.06 30.02 29.95 29.90 29.90 29.90 29.90 29.98 30.09 30.12 | 30.00 POINT MUGU (KNTD) | 2006-2011 | 30.06 30.05 30.04 29.98 29.94 29.91 29.90 29.88 29.88 29.96 30.02 30.07 | 29.97 RAMONA AIRPORT (KRNM) | 1998-2011 | 30.08 30.05 30.01 29.98 29.93 29.89 29.90 29.89 29.87 29.94 30.03 30.08 | 29.97 RED BLUFF MUNICIPAL ARPT (KRBL) | 1996-2011 | 30.14 30.08 30.05 30.00 29.93 29.87 29.86 29.86 29.87 29.98 30.10 30.15 | 29.99 REDDING MUNICIPAL AIRPORT (KRDD) | 1996-2011 | 30.13 30.08 30.04 29.99 29.92 29.86 29.85 29.85 29.87 29.98 30.09 30.15 | 29.98 RIVERSIDE MUNICIPAL ARPT (KRAL) | 1998-2011 | 30.06 30.03 29.98 29.95 29.90 29.86 29.87 29.86 29.84 29.92 30.01 30.07 | 29.95 SACRAMENTO DOWNTOWN (KSACC) | 1996-2010 | ##### ##### ##### ##### ##### ##### ##### ##### ##### ##### ##### ##### | ##### SACRAMENTO EXECUTIVE AIRPORT (KSAC) | 1996-2011 | 30.16 30.08 30.06 30.01 29.94 29.88 29.88 29.88 29.87 29.98 30.10 30.15 | 30.00 SACRAMENTO INTL AIRPORT (KSMF) | 1998-2011 | 30.15 30.07 30.05 30.00 29.93 29.87 29.86 29.86 29.86 29.97 30.09 30.14 | 29.99 SALINAS MUNICIPAL AIRPORT (KSNS) | 1996-2011 | 30.16 30.11 30.11 30.08 30.04 29.99 29.99 29.98 29.96 30.03 30.12 30.16 | 30.06 SAN DIEGO-BROWN FLD MUNI AP (KSDM) | 1997-2011 | 30.08 30.06 30.03 30.00 29.95 29.91 29.92 29.91 29.88 29.95 30.03 30.09 | 29.98 SAN DIEGO-LINDBERGH FIELD(KSAN) | 1996-2011 | 30.10 30.08 30.04 30.02 29.97 29.93 29.94 29.92 29.90 29.97 30.04 30.10 | 30.00 SAN DIEGO-MONTGOMERY FLD AP (KMYF) | 1998-2011 | 30.08 30.06 30.02 30.00 29.95 29.91 29.92 29.90 29.88 29.95 30.03 30.09 | 29.98 SAN DIEGO-NORTH ISLAND NAS (KNZY) | 2007-2011 | 30.06 30.06 30.04 29.99 29.95 29.91 29.90 29.88 29.88 29.96 30.02 30.07 | 29.98 SAN FRANCISCO DOWNTOWN (KSFOC) | 1996-2008 | ##### ##### ##### ##### ##### ##### ##### ##### ##### ##### ##### ##### | ##### SAN FRANCISCO INTL AP (KSFO) | 1996-2011 | 30.13 30.08 30.08 30.05 30.00 29.95 29.95 29.95 29.92 30.01 30.10 30.13 | 30.03 SAN JOSE INTL APT (KSJC) | 1998-2011 | 30.15 30.08 30.08 30.04 29.99 29.94 29.94 29.94 29.91 30.00 30.10 30.13 | 30.03 SAN LUIS OBISPO REGIONAL AP (KSBP) | 1998-2011 | 30.12 30.08 30.06 30.03 29.98 29.94 29.95 29.94 29.91 29.98 30.07 30.12 | 30.02 SAN NICOLAS ISLAND NAS (KNSI) | 2007-2010 | 30.01 30.06 30.05 29.99 29.93 29.90 29.89 29.87 29.90 29.95 30.00 30.06 | 29.97 SAN SIMEON-PT PIEDRAS BLANCAS(K87Q) | 1998-2005 | 30.13 30.07 30.05 30.05 29.99 29.95 29.98 29.97 29.91 29.98 30.09 30.15 | 30.03 SANDBERG (KSDB) | 1996-2011 | 30.09 30.03 29.99 29.96 29.92 29.90 29.93 29.93 29.90 29.96 30.04 30.08 | 29.98 SANTA ANA-J. WAYNE APT (KSNA) | 1999-2011 | 30.08 30.05 30.02 29.99 29.94 29.91 29.91 29.90 29.88 29.95 30.03 30.08 | 29.98 SANTA BARBARA MUNICIPAL AP (KSBA) | 1998-2011 | 30.08 30.05 30.02 29.99 29.94 29.90 29.91 29.90 29.88 29.95 30.03 30.09 | 29.98 SANTA MARIA AIRPORT(KSMX) | 1996-2011 | 30.12 30.08 30.06 30.04 29.99 29.95 29.96 29.95 29.92 29.99 30.07 30.12 | 30.02 SANTA MONICA MUNI AIRPORT (KSMO) | 1998-2011 | 30.08 30.05 30.03 29.99 29.94 29.91 29.91 29.91 29.89 29.95 30.03 30.08 | 29.98 SANTA ROSA-SONOMA COUNTY AP (KSTS) | 1998-2011 | 30.12 30.05 30.05 30.01 29.95 29.90 29.91 29.90 29.88 29.97 30.08 30.11 | 29.99 SOUTH LAKE TAHOE AIRPORT (KTVL) | 2000-2011 | 30.19 30.07 30.07 29.99 29.99 29.99 30.04 30.02 30.04 30.08 30.14 30.13 | 30.06 STOCKTON METROPOLITAN AP (KSCK) | 1996-2011 | 30.13 30.07 30.05 30.01 29.94 29.88 29.88 29.88 29.87 29.97 30.08 30.13 | 29.99 THERMAL-DESERT RESORTS AP (KTRM) | 1996-2011 | 30.07 30.01 29.93 29.86 29.78 29.75 29.75 29.75 29.76 29.86 29.99 30.06 | 29.88 UKIAH MUNICIPAL AIRPORT (KUKI) | 2001-2011 | 30.14 30.06 30.07 30.02 29.97 29.92 29.89 29.90 29.91 29.99 30.10 30.11 | 30.01 VACAVILLE-NUT TREE AIRPORT (KVCB) | 1998-2011 | 30.14 30.06 30.05 30.00 29.93 29.87 29.86 29.86 29.86 29.97 30.09 30.14 | 29.99 VAN NUYS AIRPORT (KVNY) | 1998-2011 | 30.07 30.04 30.00 29.97 29.91 29.88 29.89 29.88 29.86 29.93 30.02 30.08 | 29.96 WATSONVILLE MUNICIPAL ARPT (KWVI) | 1998-2011 | 30.14 30.08 30.09 30.05 30.01 29.96 29.97 29.96 29.93 30.01 30.10 30.14 | 30.04 COLORADO STATION | Years | Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec | Year AKRON REGIONAL AP (KAKO) | 1996-2011 | 30.11 30.09 30.05 30.02 29.96 29.93 29.92 29.95 29.98 30.04 30.10 30.12 | 30.02 ALAMOSA-SAN LUIS VALLEY AP (KALS) | 1996-2011 | 30.25 30.16 30.05 29.96 29.93 29.93 30.03 30.06 30.04 30.09 30.19 30.23 | 30.08 ASPEN-PITKIN COUNTY ARPT (KASE) | 1998-2011 | 30.17 30.10 30.04 29.97 29.94 29.91 29.96 29.98 29.99 30.03 30.12 30.15 | 30.03 BURLINGTON-KIT CARSON AP (KITR) | 1997-2011 | 30.11 30.09 30.04 30.02 29.95 29.90 29.91 29.94 29.98 30.04 30.10 30.10 | 30.01 COLORADO SPRINGS MUNI AP (KCOS) | 1996-2011 | 30.12 30.10 30.06 30.03 29.96 29.94 29.94 29.98 29.99 30.06 30.11 30.11 | 30.03 CORTEZ MUNICIPAL AIRPORT (KCEZ) | 1996-2011 | 30.17 30.09 30.02 29.93 29.90 29.89 29.93 29.98 29.99 30.04 30.13 30.16 | 30.02 CRAIG-MOFFAT AIRPORT (KCAG) | 1996-2011 | 30.31 30.23 30.11 29.99 29.96 29.95 29.98 30.02 30.04 30.11 30.22 30.29 | 30.10 DENVER INTERNATIONAL AIRPORT (KDEN) | 1996-2011 | 30.07 30.04 30.01 30.02 29.94 29.90 29.90 29.92 29.96 30.02 30.05 30.08 | 29.99 DENVER-CENTENNIAL AIRPORT (KAPA) | 1998-2011 | 30.09 30.06 30.03 30.02 29.97 29.94 29.94 29.97 30.00 30.03 30.08 30.10 | 30.02 DURANGO-LA PLATA CO AIRPORT (KDRO) | 1996-2011 | 30.24 30.14 30.04 29.94 29.92 29.91 29.97 30.01 30.01 30.07 30.17 30.21 | 30.05 ELLICOTT-BULLSEYE USAF (KABH) | 2007-2011 | 30.33 30.33 30.55 30.48 30.40 30.16 30.27 30.30 30.17 30.29 30.40 30.35 | 30.34 GRAND JUNCTION-WALKER FIELD (KGJT) | 1996-2011 | 30.21 30.11 30.01 29.94 29.90 29.86 29.86 29.90 29.93 30.01 30.13 30.20 | 30.01 LA JUNTA MUNICIPAL AIRPORT (KLHX) | 1996-2011 | 30.10 30.08 30.02 30.02 29.95 29.92 29.87 29.90 29.95 30.02 30.08 30.09 | 30.00 LAMAR MUNICIPAL AIRPORT (KLAA) | 1996-2011 | 30.12 30.09 30.03 30.02 29.95 29.92 29.88 29.91 29.96 30.04 30.10 30.11 | 30.01 LEADVILLE/LAKE COUNTY APT (KLXV) | 1998-2011 | 30.09 30.05 30.02 29.97 29.96 29.94 29.97 30.00 29.99 30.01 30.08 30.05 | 30.01 LIMON MUNICIPAL AIRPORT (KLIC) | 1996-2011 | 30.11 30.09 30.04 30.01 29.97 29.93 29.92 29.95 29.98 30.05 30.10 30.10 | 30.02 MEEKER AIRPORT (KEEO) | 1997-2011 | 30.24 30.15 30.06 29.96 29.93 29.91 29.95 29.98 30.00 30.07 30.17 30.23 | 30.05 MONTROSE REGIONAL AIRPORT (KMTJ) | 1996-2011 | 30.19 30.10 30.02 29.93 29.91 29.89 29.92 29.96 29.99 30.05 30.14 30.19 | 30.02 PUEBLO MEMORIAL AIRPORT (KPUB) | 1996-2011 | 30.11 30.08 30.04 30.02 29.96 29.93 29.89 29.93 29.97 30.04 30.09 30.10 | 30.01 RIFLE-GARFIELD CO AIRPORT (KRIL) | 1997-2011 | 30.24 30.13 30.04 29.95 29.92 29.89 29.93 29.97 30.00 30.06 30.16 30.24 | 30.04 SPRINGFIELD AP (KSPD) | 1998-2011 | 30.07 30.06 30.01 29.99 29.94 29.88 29.88 29.90 29.95 29.99 30.06 30.07 | 29.98 TRINIDAD-PERRY STOKES AP (KTAD) | 1996-2011 | 30.08 30.05 30.01 29.95 29.93 29.89 29.91 29.92 29.96 29.98 30.07 30.05 | 29.98 HAWAII STATION | Years | Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec | Year BRADSHAW ARMY AIRFIELD (PHSF) | 2007-2011 | 30.03 30.07 30.08 30.06 30.07 30.07 30.07 30.06 30.04 30.08 30.03 30.04 | 30.06 HILO INTERNATIONAL AIRPORT (PHTO) | 1996-2011 | 30.02 30.06 30.06 30.09 30.06 30.05 30.04 30.03 30.00 30.01 30.02 30.03 | 30.04 HONOLULU INTERNATIONAL AP (PHNL) | 1996-2011 | 30.00 30.05 30.05 30.07 30.04 30.04 30.03 30.01 29.99 29.99 30.01 30.01 | 30.02 KAHULUI AIRPORT (PHOG) | 1996-2011 | 30.02 30.06 30.06 30.08 30.06 30.05 30.04 30.02 30.00 30.01 30.02 30.03 | 30.04 KALAELOA AIRPORT (PHJR) | 1999-2011 | 30.03 30.07 30.07 30.09 30.07 30.06 30.05 30.03 30.02 30.02 30.03 30.04 | 30.05 KANEOHE MCAS (PHNG) | 1996-2011 | 29.99 30.05 30.07 30.07 30.04 30.05 30.03 30.02 29.99 30.01 30.02 29.99 | 30.03 KEKAHA-BARKING SANDS (PHBK) | 1996-2011 | 29.99 30.05 30.06 30.06 30.04 30.05 30.03 30.01 29.99 30.01 30.02 30.00 | 30.03 KONA INTL AT KEAHOLE ARPT (PHKO) | 1998-2011 | 29.98 30.01 30.01 30.03 30.01 30.00 29.98 29.97 29.95 29.96 29.97 29.98 | 29.99 LIHUE AIRPORT (PHLI) | 1996-2011 | 30.01 30.07 30.07 30.10 30.07 30.06 30.06 30.04 30.01 30.02 30.03 30.03 | 30.05 MOLOKAI AIRPORT (PHMK) | 1999-2011 | 30.03 30.06 30.07 30.08 30.06 30.05 30.04 30.02 30.01 30.01 30.03 30.04 | 30.04 IDAHO STATION | Years | Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec | Year BOISE AIR TERMINAL (KBOI) | 1996-2011 | 30.20 30.13 30.05 29.97 29.93 29.89 29.87 29.88 29.94 30.05 30.15 30.22 | 30.02 BURLEY MUNICIPAL AIRPORT (KBYI) | 1996-2011 | 30.21 30.12 30.04 29.96 29.92 29.90 29.90 29.91 29.97 30.05 30.15 30.18 | 30.03 CHALLIS AIRPORT (KLLJ) | 1998-2011 | 30.24 30.14 30.03 29.97 29.93 29.91 29.89 29.91 29.98 30.06 30.16 30.24 | 30.04 ELK CITY (KP69) | 1997-2011 | 30.23 30.17 30.19 30.04 30.00 29.95 29.92 29.93 30.00 30.13 30.19 30.26 | 30.08 IDAHO FALLS REGIONAL ARPT (KIDA) | 1998-2011 | 30.28 30.19 30.07 29.98 29.94 29.93 29.95 29.96 30.01 30.09 30.19 30.25 | 30.07 JEROME COUNTY AIRPORT (KJER) | 1997-2011 | 30.23 30.14 30.06 29.98 29.94 29.91 29.91 29.92 29.97 30.07 30.16 30.23 | 30.04 LEWISTON-NEZ PERCE COUNTY AP (KLWS) | 1996-2011 | 30.15 30.12 30.05 30.00 29.97 29.93 29.92 29.92 29.96 30.07 30.13 30.20 | 30.04 MCCALL MUNICIPAL AIRPORT (KMYL) | 1997-2011 | 30.20 30.15 30.08 30.01 29.98 29.96 29.98 29.98 30.03 30.10 30.16 30.22 | 30.07 MULLAN PASS (KMLP) | 1996-2011 | 30.09 30.07 30.03 29.95 29.90 29.88 29.89 29.89 29.92 30.00 30.07 30.16 | 29.99 POCATELLO REGIONAL AIRPORT (KPIH) | 1996-2011 | 30.23 30.16 30.06 29.98 29.94 29.91 29.93 29.93 29.99 30.07 30.18 30.23 | 30.05 REXBURG-MADISON COUNTY APT (KRXE) | 1998-2011 | 30.27 30.19 30.06 29.98 29.94 29.94 29.95 29.96 30.01 30.09 30.18 30.26 | 30.07 STANLEY RANGER STATION (KSNT) | 1998-2011 | 30.20 30.10 30.04 29.96 29.94 29.92 29.93 29.94 30.00 30.06 30.14 30.20 | 30.04 TWIN FALLS-MAGIC VLY RGN APT (KTWF) | 1997-2011 | 30.15 30.09 30.01 29.95 29.91 29.88 29.86 29.87 29.93 30.02 30.11 30.18 | 30.00 MONTANA STATION | Years | Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec | Year BAKER MUNICIPAL AIRPORT (KBHK) | 1998-2011 | 30.12 30.12 30.06 30.02 29.99 29.96 29.93 29.94 30.01 30.05 30.09 30.11 | 30.03 BELGRADE/BOZEMAN-GALLATIN PA (KBZN) | 1996-2011 | 30.18 30.14 30.06 30.02 29.97 29.95 29.96 29.98 30.01 30.09 30.15 30.20 | 30.06 BILLINGS LOGAN INTL AP (KBIL) | 1996-2011 | 30.11 30.09 30.05 30.01 29.97 29.92 29.92 29.94 29.98 30.06 30.09 30.12 | 30.02 BUTTE-BERT MOONEY AIRPORT (KBTM) | 1996-2011 | 30.19 30.13 30.05 30.00 29.98 29.95 29.98 29.98 30.02 30.10 30.16 30.20 | 30.06 CUT BANK MUNICIPAL AIRPORT (KCTB) | 2001-2011 | 30.11 30.09 30.05 29.99 29.98 29.93 29.94 29.95 29.98 30.03 30.06 30.10 | 30.02 DILLON AIRPORT (KDLN) | 1997-2011 | 30.16 30.10 30.03 29.99 29.94 29.93 29.94 29.96 29.99 30.06 30.12 30.20 | 30.04 GLASGOW INTL AIRPORT (KGGW) | 1996-2011 | 30.15 30.13 30.08 30.01 29.99 29.94 29.92 29.93 29.99 30.05 30.10 30.14 | 30.03 GREAT FALLS INTERNATIONAL AP (KGTF) | 1996-2011 | 30.12 30.11 30.06 30.03 29.98 29.92 29.92 29.95 29.98 30.06 30.09 30.14 | 30.03 GREAT FALLS-MALMSTROM FIELD (KGFA) | 2005-2011 | 30.16 30.13 30.04 30.02 30.01 29.97 29.97 29.96 30.04 30.08 30.08 30.15 | 30.05 HAVRE CITY-COUNTY AIRPORT (KHVR) | 1996-2011 | 30.14 30.11 30.07 30.02 29.97 29.93 29.92 29.94 29.98 30.05 30.09 30.15 | 30.03 HELENA REGIONAL AIRPORT (KHLN) | 1996-2011 | 30.20 30.16 30.08 30.04 29.99 29.96 29.97 29.99 30.03 30.10 30.16 30.23 | 30.08 JORDAN AIRPORT (KJDN) | 1997-2011 | 30.13 30.11 30.07 30.02 29.99 29.94 29.92 29.94 29.99 30.06 30.10 30.13 | 30.03 KALISPELL-GLACIER PARK AP (KGPI) | 1996-2011 | 30.16 30.12 30.05 30.01 29.98 29.95 29.96 29.96 30.00 30.09 30.14 30.19 | 30.05 LEWISTOWN MUNICIPAL ARPT (KLWT) | 2000-2011 | 30.11 30.09 30.04 30.00 29.97 29.93 29.94 29.95 29.99 30.05 30.07 30.11 | 30.02 LIVINGSTON-MISSION FIELD (KLVM) | 2000-2011 | 30.12 30.08 30.03 29.99 29.97 29.93 29.94 29.95 29.99 30.06 30.09 30.13 | 30.02 MILES CITY-FRANK WILEY FIELD (KMLS) | 2000-2011 | 30.14 30.12 30.06 30.02 29.99 29.91 29.90 29.91 29.99 30.05 30.10 30.13 | 30.03 MISSOULA INTERNATIONAL AP (KMSO) | 1996-2011 | 30.19 30.15 30.07 30.03 29.99 29.96 29.97 29.98 30.02 30.12 30.16 30.22 | 30.07 WOLF POINT-L M CLAYTON AP (KOLF) | 1998-2011 | 30.16 30.15 30.09 30.01 29.99 29.95 29.92 29.93 30.01 30.05 30.10 30.14 | 30.04 NEVADA STATION | Years | Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec | Year CALIENTE AIRPORT (KP38) | 1997-2002 | 30.17 30.15 30.00 29.97 29.90 29.86 29.90 29.92 29.93 30.02 30.14 30.24 | 30.02 ELKO REGIONAL AIRPORT (KEKO) | 1996-2011 | 30.27 30.15 30.06 29.96 29.94 29.90 29.91 29.92 29.99 30.07 30.18 30.20 | 30.05 ELY AIRPORT/YELLAND FIELD (KELY) | 1996-2011 | 30.20 30.12 30.04 29.96 29.91 29.86 29.88 29.89 29.96 30.06 30.14 30.21 | 30.02 EUREKA AIRPORT (KP68) | 1997-2011 | 30.19 30.08 30.02 29.95 29.92 29.88 29.89 29.90 29.96 30.04 30.13 30.19 | 30.01 FALLON NAS (KNFL) | 1996-2011 | 30.05 29.98 29.97 29.92 29.91 29.89 29.92 29.92 29.94 30.00 30.03 30.06 | 29.97 INDIAN SPRING AUX AIRFIELD (KINS) | 2007-2011 | 30.08 29.97 29.94 29.85 29.74 29.72 29.71 29.76 29.80 29.93 30.04 30.02 | 29.88 LAS VEGAS-MCCARRAN INT'L AP (KLAS) | 1996-2011 | 30.10 30.03 29.94 29.87 29.81 29.80 29.77 29.79 29.83 29.92 30.03 30.11 | 29.92 LOVELOCK-DERBY FIELD AIRPORT (KLOL) | 1996-2011 | 30.24 30.10 30.06 29.96 29.92 29.87 29.87 29.89 29.95 30.05 30.17 30.20 | 30.02 MERCURY-DESERT ROCK AIRPORT (KDRA) | 1996-2011 | 30.09 30.02 29.95 29.88 29.82 29.80 29.79 29.80 29.85 29.93 30.04 30.09 | 29.92 NORTH LAS VEGAS AIRPORT (KVGT) | 2000-2011 | 30.11 30.02 29.94 29.86 29.82 29.79 29.74 29.76 29.83 29.92 30.04 30.10 | 29.91 RENO/TAHOE INTERNATIONAL AP (KRNO) | 1996-2011 | 30.16 30.07 30.03 29.96 29.92 29.88 29.91 29.91 29.94 30.04 30.12 30.17 | 30.01 TONOPAH AIRPORT (KTPH) | 1996-2011 | 30.18 30.07 30.02 29.93 29.88 29.84 29.86 29.88 29.94 30.02 30.13 30.16 | 29.99 TONOPAH TEST RANGE #74 (KBJN) | 2007-2011 | 29.83 29.74 29.67 29.56 29.56 29.49 29.57 29.57 29.62 29.68 29.80 29.78 | 29.66 WINNEMUCCA MUNICIPAL AIRPORT (KWMC) | 1996-2011 | 30.19 30.10 30.05 29.97 29.93 29.88 29.90 29.91 29.96 30.06 30.16 30.20 | 30.03 NEW MEXICO STATION | Years | Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec | Year ALBUQUERQUE INTL SUNPORT AP (KABQ) | 1996-2011 | 30.11 30.04 29.96 29.91 29.85 29.84 29.88 29.91 29.91 29.98 30.08 30.11 | 29.96 CARLSBAD-CAVERN CITY AP (KCNM) | 1996-2011 | 30.07 30.02 29.96 29.87 29.81 29.85 29.86 29.87 29.92 29.94 30.04 30.07 | 29.94 CLAYTON MUNICIPAL AIRPARK AP (KCAO) | 1996-2011 | 30.06 30.06 30.03 29.99 29.92 29.88 29.91 29.95 29.96 30.01 30.06 30.06 | 29.99 CLINES CORNERS (KCQC) | 1998-2011 | 30.11 30.05 30.00 29.92 29.90 29.90 29.99 30.01 30.00 30.02 30.10 30.10 | 30.01 DEMING MUNICIPAL AIRPORT (KDMN) | 2000-2011 | 30.07 30.00 29.92 29.85 29.80 29.79 29.83 29.86 29.88 29.93 30.03 30.07 | 29.92 FARMINGTON-FOUR CORNERS AP (KFMN) | 1998-2011 | 30.20 30.10 30.02 29.92 29.90 29.89 29.94 29.98 30.00 30.05 30.15 30.19 | 30.03 GALLUP MUNICIPAL AIRPORT (KGUP) | 1996-2011 | 30.25 30.12 30.01 29.89 29.83 29.85 29.75 29.78 29.86 29.97 30.14 30.22 | 29.97 GRANTS-MILAN MUNI AIRPORT (KGNT) | 1997-2011 | 30.17 30.08 30.01 29.92 29.89 29.89 29.96 30.00 29.99 30.04 30.14 30.18 | 30.02 LAS VEGAS MUNICIPAL ARPT (KLVS) | 2000-2011 | 30.05 30.02 29.98 29.91 29.88 29.87 29.95 29.96 29.97 29.98 30.04 30.03 | 29.97 RATON MUNI/CREWS FIELD APT (KRTN) | 1998-2011 | 30.09 30.05 29.99 29.95 29.92 29.89 29.95 29.97 29.98 30.01 30.09 30.07 | 30.00 ROSWELL INTERNATIONAL AP (KROW) | 1996-2011 | 30.07 30.03 29.97 29.92 29.86 29.84 29.86 29.88 29.91 29.97 30.05 30.07 | 29.95 SANTA FE MUNICIPAL AIRPORT (KSAF) | 1997-2011 | 30.10 30.04 29.97 29.90 29.86 29.85 29.91 29.94 29.94 29.99 30.08 30.10 | 29.97 TRUTH OR CONSEQUENCES AP (KTCS) | 1996-2011 | 30.05 29.98 29.94 29.87 29.80 29.82 29.85 29.88 29.88 29.94 30.03 30.06 | 29.93 TUCUMCARI MUNICIPAL ARPT (KTCC) | 2000-2011 | 30.10 30.05 29.98 29.93 29.89 29.86 29.87 29.89 29.95 29.98 30.07 30.07 | 29.97 OREGON STATION | Years | Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec | Year ASTORIA REGIONAL AIRPORT (KAST) | 1996-2011 | 30.10 30.09 30.07 30.06 30.07 30.06 30.07 30.05 30.02 30.07 30.08 30.15 | 30.07 AURORA STATE AIRPORT (KUAO) | 1997-2011 | 30.13 30.10 30.09 30.06 30.06 30.05 30.04 30.01 30.01 30.10 30.11 30.17 | 30.08 BAKER CITY MUNICIPAL ARPT (KBKE) | 1996-2011 | 30.23 30.16 30.08 30.01 29.99 29.97 29.97 29.97 30.02 30.10 30.19 30.20 | 30.07 BURNS MUNICIPAL AIRPORT (KBNO) | 1996-2011 | 30.19 30.13 30.06 30.00 29.98 29.95 29.95 29.96 30.00 30.09 30.15 30.21 | 30.06 EUGENE-MAHLON SWEET FIELD (KEUG) | 1996-2011 | 30.13 30.11 30.09 30.07 30.06 30.05 30.03 30.01 30.01 30.09 30.12 30.18 | 30.08 HERMISTON MUNICIPAL ARPT (KHRI) | 1998-2011 | 30.18 30.13 30.05 30.00 29.98 29.94 29.92 29.92 29.97 30.07 30.14 30.20 | 30.04 KLAMATH FALLS AIRPORT (KLMT) | 1997-2011 | 30.16 30.08 30.05 30.00 29.98 29.96 29.96 29.96 29.99 30.08 30.13 30.19 | 30.04 MC MINNVILLE MUNICIPAL APT (KMMV) | 1997-2011 | 30.13 30.11 30.08 30.07 30.07 30.05 30.04 30.02 30.02 30.10 30.12 30.17 | 30.08 MEACHAM (KMEH) | 1998-2011 | 30.16 30.11 30.07 30.02 30.02 30.00 30.02 30.02 30.05 30.10 30.13 30.18 | 30.07 MEDFORD AIRPORT (KMFR) | 1996-2011 | 30.16 30.09 30.08 30.04 30.01 29.98 29.95 29.95 29.97 30.07 30.13 30.17 | 30.05 NORTH BEND MUNICIPAL ARPT (KOTH) | 1996-2008 | ##### 30.12 ##### ##### ##### ##### 30.09 ##### 30.08 30.07 ##### ##### | ##### ONTARIO MUNICIPAL AIRPORT (KONO) | 1997-2011 | 30.26 30.17 30.08 30.00 29.96 29.92 29.90 29.91 29.97 30.09 30.19 30.27 | 30.06 PENDLETON AIRPORT (KPDT) | 1996-2011 | 30.14 30.10 30.03 29.98 29.97 29.93 29.92 29.91 29.95 30.05 30.11 30.18 | 30.02 PORTLAND INTERNATIONAL AP (KPDX) | 1996-2011 | 30.13 30.12 30.08 30.06 30.06 30.04 30.03 30.01 30.01 30.09 30.11 30.18 | 30.08 PORTLAND-HILLSBORO AIRPORT (KHIO) | 1998-2011 | 30.11 30.10 30.08 30.06 30.06 30.04 30.03 30.01 30.01 30.09 30.11 30.17 | 30.07 PORTLAND-TROUTDALE AIRPORT (KTTD) | 1998-2011 | 30.13 30.10 30.08 30.05 30.05 30.03 30.02 30.00 30.01 30.08 30.11 30.16 | 30.07 REDMOND-ROBERTS FIELD (KRDM) | 1996-2011 | 30.16 30.10 30.06 30.01 30.00 29.98 29.97 29.97 30.01 30.08 30.14 30.15 | 30.05 ROME STATE AIRPORT (KREO) | 1998-2011 | 30.20 30.10 30.05 29.97 29.94 29.91 29.90 29.91 29.96 30.07 30.14 30.20 | 30.03 ROSEBURG REGIONAL AIRPORT (KRBG) | 1997-2011 | 30.13 30.10 30.09 30.07 30.06 30.04 30.01 30.00 30.00 30.09 30.12 30.17 | 30.07 SALEM-MCNARY FIELD AIRPORT (KSLE) | 1996-2011 | 30.11 30.11 30.08 30.06 30.05 30.03 30.02 30.00 30.00 30.08 30.10 30.18 | 30.07 SCAPPOOSE INDUS AIRPK ARPT (KSPB) | 1998-2011 | 30.12 30.10 30.08 30.05 30.06 30.04 30.03 30.01 30.01 30.08 30.11 30.15 | 30.07 SEXTON SUMMIT (KSXT) | 1996-2011 | 30.11 30.07 30.07 30.03 30.01 29.99 29.96 29.96 29.96 30.04 30.09 30.15 | 30.04 PACIFIC ISLANDS STATION | Years | Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec | Year CHUUK/WENO ISLAND (PTKK) | 1996-2005 | ##### ##### ##### ##### ##### ##### ##### ##### ##### ##### ##### ##### | ##### FRANCISCO C. ADA/SAIPAN AP (PGSN) | 2000-2011 | 29.87 29.89 29.90 29.88 29.86 29.86 29.83 29.82 29.82 29.83 29.83 29.86 | 29.85 GUAM INTERNATIONAL AIRPORT (PGUM) | 1996-2011 | 29.87 29.87 29.87 29.86 29.85 29.85 29.83 29.81 29.81 29.81 29.81 29.84 | 29.84 KOROR PALAU/NWS (PTKR) | 1996-2005 | ##### ##### ##### ##### ##### ##### ##### ##### ##### ##### ##### ##### | ##### KWAJALEIN (PKWA) | 1996-2005 | ##### ##### ##### ##### ##### ##### ##### ##### ##### ##### ##### ##### | ##### MAJURO/NWS OFFICE (PKMR) | 1996-2005 | ##### ##### ##### ##### ##### ##### ##### ##### ##### ##### ##### ##### | ##### POHNPEI NWS (PTTP) | 1996-2005 | ##### ##### ##### ##### ##### ##### ##### ##### ##### ##### ##### ##### | ##### TAFUNA/PAGO PAGO INTL AP (NSTU) | 1996-2005 | ##### ##### ##### ##### ##### ##### ##### ##### ##### ##### ##### ##### | ##### YAP ISLAND (PTYA) | 1996-2005 | ##### ##### ##### ##### ##### ##### ##### ##### ##### ##### ##### ##### | ##### UTAH STATION | Years | Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec | Year BRYCE CANYON AIRPORT (KBCE) | 2000-2011 | 30.19 30.09 30.03 29.92 29.89 29.90 29.95 29.97 29.99 30.02 30.11 30.15 | 30.02 CEDAR CITY REGIONAL ARPT (KCDC) | 1996-2011 | 30.19 30.10 30.01 29.92 29.89 29.87 29.90 29.91 29.95 30.02 30.12 30.18 | 30.01 GRANITE PEAK DUGWAY PG (KQCA) | 2007-2011 | 29.03 28.88 28.81 28.80 28.79 28.77 28.82 28.80 28.87 28.92 28.94 28.95 | 28.86 LOGAN-CACHE AIRPORT (KLGU) | 1998-2011 | 30.28 30.19 30.06 29.98 29.94 29.93 29.90 29.91 30.00 30.08 30.18 30.25 | 30.06 MILFORD MUNICIPAL AIRPORT (KMLF) | 1996-2011 | 30.21 30.13 30.03 29.94 29.90 29.86 29.89 29.91 29.95 30.04 30.14 30.20 | 30.02 MOAB-CANYONLANDS FIELD AP (KCNY) | 1998-2011 | 30.24 30.11 30.01 29.92 29.90 29.86 29.84 29.88 29.94 30.01 30.14 30.22 | 30.01 OGDEN-HINCKLEY AIRPORT (KOGD) | 1998-2011 | 30.22 30.11 30.03 29.96 29.91 29.88 29.86 29.88 29.95 30.03 30.13 30.20 | 30.01 PRICE-CARBON COUNTY AIRPORT (KPUC) | 1998-2011 | 30.27 30.17 30.06 29.95 29.92 29.89 29.87 29.92 29.99 30.07 30.20 30.26 | 30.05 SALT LAKE CITY INTL AP (KSLC) | 1996-2011 | 30.21 30.12 30.03 29.97 29.92 29.88 29.85 29.87 29.94 30.03 30.14 30.21 | 30.01 VERNAL AIRPORT (KVEL) | 1998-2011 | 30.32 30.17 30.03 29.95 29.92 29.90 29.91 29.95 29.98 30.06 30.18 30.28 | 30.05 WASHINGTON STATION | Years | Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec | Year BELLINGHAM INTL AIRPORT (KBLI) | 1998-2011 | 30.12 30.12 30.08 30.05 30.06 30.04 30.05 30.03 30.04 30.10 30.11 30.14 | 30.08 DEER PARK AIRPORT (KDEW) | 1998-2011 | 30.17 30.12 30.06 30.00 29.98 29.95 29.95 29.94 29.99 30.09 30.15 30.19 | 30.05 ELLENSBURG-BOWERS FIELD AP (KELN) | 1998-2011 | 30.15 30.11 30.04 29.99 29.99 29.95 29.94 29.94 29.98 30.07 30.14 30.17 | 30.04 EPHRATA MUNICIPAL AIRPORT (KEPH) | 2001-2011 | 30.17 30.12 30.04 29.97 29.94 29.90 29.89 29.89 29.95 30.05 30.15 30.18 | 30.02 EVERETT-SNOHOMISH/PAINE FLD (KPAE) | 1998-2011 | 30.11 30.11 30.07 30.06 30.07 30.06 30.08 30.05 30.06 30.10 30.11 30.13 | 30.08 FRIDAY HARBOR AIRPORT (KFHR) | 1998-2011 | 30.11 30.11 30.06 30.04 30.05 30.04 30.05 30.03 30.03 30.09 30.09 30.12 | 30.07 HOQUIAM-BOWERMAN AIRPORT (KHQM) | 2001-2011 | 30.09 30.10 30.07 30.05 30.08 30.07 30.08 30.05 30.05 30.08 30.10 30.11 | 30.08 MOSES LAKE-GRANT CNTY INT AP (KMWH) | 1997-2011 | 30.15 30.12 30.06 30.00 29.96 29.92 29.91 29.91 29.96 30.08 30.14 30.21 | 30.04 OLYMPIA AIRPORT (KOLM) | 1996-2011 | 30.11 30.12 30.07 30.06 30.06 30.04 30.05 30.03 30.03 30.09 30.09 30.15 | 30.08 OMAK AIRPORT (KOMK) | 1998-2011 | 30.19 30.13 30.03 29.99 29.95 29.92 29.90 29.90 29.97 30.07 30.15 30.21 | 30.03 PASCO-TRI-CITIES AIRPORT (KPSC) | 1998-2011 | 30.18 30.13 30.05 30.00 29.97 29.93 29.91 29.91 29.96 30.07 30.15 30.21 | 30.04 PORT ANGELES INT AP (KCLM) | 1998-2011 | 30.10 30.11 30.06 30.05 30.07 30.05 30.06 30.03 30.04 30.09 30.09 30.12 | 30.07 PULLMAN/MOSCOW RGNL ARPT (KPUW) | 1998-2011 | 30.17 30.13 30.06 30.02 30.01 29.98 29.98 29.98 30.01 30.09 30.15 30.19 | 30.06 QUILLAYUTE AIRPORT (KUIL) | 1996-2011 | 30.09 30.09 30.05 30.05 30.06 30.05 30.07 30.05 30.03 30.07 30.08 30.14 | 30.07 RENTON MUNICIPAL AIRPORT (KRNT) | 1998-2011 | 30.12 30.11 30.08 30.06 30.07 30.05 30.05 30.03 30.04 30.10 30.11 30.14 | 30.08 SEATTLE SAND POINT WSFO (KSEW) | 1999-2008 | ##### ##### ##### ##### ##### ##### ##### ##### ##### ##### ##### ##### | ##### SEATTLE-BOEING FIELD (KBFI) | 1998-2011 | 30.10 30.09 30.07 30.04 30.05 30.03 30.04 30.01 30.03 30.09 30.09 30.12 | 30.06 SEATTLE-TACOMA INTL AP (KSEA) | 1996-2011 | 30.12 30.12 30.08 30.06 30.06 30.05 30.06 30.04 30.03 30.10 30.10 30.15 | 30.08 SHELTON-SANDERSON FIELD (KSHN) | 1998-2011 | 30.10 30.09 30.06 30.04 30.05 30.02 30.03 30.01 30.01 30.08 30.10 30.12 | 30.06 SPOKANE INTERNATIONAL AP (KGEG) | 1996-2011 | 30.13 30.12 30.04 29.99 29.96 29.93 29.94 29.94 29.97 30.07 30.12 30.19 | 30.03 SPOKANE-FELTS FIELD AIRPORT (KSFF) | 1998-2011 | 30.16 30.12 30.05 30.00 29.97 29.94 29.93 29.92 29.98 30.08 30.14 30.19 | 30.04 STAMPASS PASS FLTWO (KSMP) | 1996-2011 | 30.10 30.10 30.06 30.04 30.05 30.04 30.07 30.05 30.04 30.09 30.11 30.16 | 30.07 TACOMA NARROWS AIRPORT (KTIW) | 1999-2011 | 30.10 30.10 30.07 30.04 30.06 30.04 30.04 30.02 30.03 30.09 30.10 30.12 | 30.07 THE DALLES AP, DALLESPORT (KDLS) | 2000-2011 | 30.20 30.14 30.08 30.02 30.00 29.97 29.94 29.93 29.98 30.08 30.17 30.20 | 30.06 VANCOUVER-PEARSON FIELD (KVUO) | 1996-2011 | 30.12 30.12 30.08 30.06 30.05 30.04 30.03 30.01 30.01 30.09 30.11 30.19 | 30.08 WALLA WALLA REGIONAL ARPT (KALW) | 1998-2011 | 30.18 30.13 30.06 30.01 29.99 29.96 29.94 29.93 29.99 30.07 30.14 30.20 | 30.05 WENATCHEE-PANGBORN AP (KEAT) | 1996-2011 | 30.18 30.12 30.04 29.98 29.96 29.93 29.91 29.90 29.96 30.06 30.15 30.18 | 30.03 WHIDBEY ISLAND NAS (KNUW) | 1996-2011 | 30.09 30.06 30.06 30.06 30.06 30.04 30.06 30.01 30.03 30.09 30.05 30.11 | 30.06 YAKIMA AIR TERMINAL (KYKM) | 1996-2011 | 30.16 30.13 30.05 30.00 29.98 29.94 29.93 29.93 29.97 30.07 30.14 30.20 | 30.04 WYOMING STATION | Years | Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec | Year BIG PINEY-MARBLETON ARPT (KBPI) | 1998-2011 | 30.26 30.19 30.07 29.98 29.94 29.93 29.97 29.98 30.01 30.06 30.18 30.23 | 30.07 BUFFALO-JOHNSON COUNTY AP (KBYG) | 1998-2011 | 30.08 30.07 30.03 30.02 29.96 29.95 29.92 29.93 29.99 30.04 30.06 30.09 | 30.01 CASPER-NATRONA COUNTY AP (KCPR) | 1996-2011 | 30.10 30.07 30.04 30.02 29.96 29.91 29.91 29.93 29.97 30.06 30.09 30.13 | 30.02 CHEYENNE AIRPORT (KCYS) | 1996-2011 | 30.07 30.07 30.02 30.02 29.95 29.90 29.93 29.95 29.96 30.02 30.07 30.08 | 30.00 DOUGLAS-CONVERSE COUNTY AP (KDGW) | 1999-2011 | 30.14 30.09 30.03 30.02 29.97 29.94 29.92 29.93 29.99 30.05 30.11 30.14 | 30.03 EVANSTON-UINTA CO AP (KEVW) | 1999-2011 | 30.20 30.13 30.05 29.98 29.95 29.94 29.95 29.97 30.01 30.06 30.15 30.19 | 30.05 GILLETTE-CAMPBELL CO. ARPT (KGCC) | 1998-2011 | 30.11 30.08 30.03 30.03 29.97 29.95 29.92 29.93 29.99 30.05 30.08 30.11 | 30.02 GREYBULL AIRPORT (KGEY) | 1998-2011 | 30.20 30.14 30.03 30.01 29.94 29.93 29.89 29.90 30.00 30.06 30.13 30.21 | 30.04 LANDER-HUNT FIELD AIRPORT (KLND) | 1996-2011 | 30.13 30.08 30.03 30.01 29.94 29.91 29.91 29.92 29.96 30.04 30.11 30.15 | 30.02 LARAMIE REGIONAL AIRPORT (KLAR) | 1996-2011 | 30.11 30.05 30.01 29.99 29.94 29.89 29.92 29.94 29.98 30.01 30.09 30.10 | 30.00 RAWLINS MUNICIPAL AIRPORT (KRWL) | 2000-2011 | 30.17 30.10 30.03 29.99 29.92 29.92 29.91 29.94 29.98 30.03 30.13 30.14 | 30.02 RIVERTON REGIONAL AIRPORT (KRIW) | 1996-2011 | 30.14 30.09 30.03 30.01 29.94 29.92 29.91 29.93 29.98 30.05 30.12 30.16 | 30.02 ROCK SRINGS-SWEETWATER AP (KRKS) | 1996-2011 | 30.23 30.15 30.06 29.98 29.94 29.94 29.95 29.97 30.00 30.05 30.16 30.19 | 30.05 SHERIDAN COUNTY AIRPORT (KSHR) | 1996-2011 | 30.13 30.10 30.06 30.04 29.97 29.93 29.93 29.94 30.00 30.06 30.10 30.13 | 30.03 TORRINGTON MUNICIPAL ARPT (KTOR) | 1998-2011 | 30.11 30.07 30.01 30.01 29.95 29.92 29.90 29.92 29.97 30.03 30.09 30.11 | 30.01 WORLAND MUNICIPAL AIRPORT (KWRL) | 2000-2011 | 30.20 30.14 30.02 30.01 29.94 29.90 29.89 29.91 29.99 30.06 30.13 30.20 | 30.03 YELLOWSTONE LAKE (KP60) | 1998-2011 | 30.26 30.20 30.10 30.03 30.05 30.03 30.09 30.10 30.11 30.15 30.21 30.24 | 30.13