The lowest temperature that can be obtained by evaporating water into the air.
For more information, click one of the following: Western States, Alaska, or Hawaii and Pacific Islands
MEAN MONTHLY AND ANNUAL WET BULB TEMPERATURES (deg F)
JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANNUAL
ALASKA
ANCHORAGE 17 18 24 33 42 49 54 52 45 31 20 19 34
ANNETTE 35 36 38 41 47 51 51 52 48 45 38 36 43
BARROW -13 -14 -12 1 21 34 39 38 31 15 -2 -10 11
BETHEL 6 7 14 24 38 47 49 47 39 27 15 11 27
BETTLES -7 -8 4 20 39 51 50 45 34 16 -6 -4 20
BIG DELTA 0 3 14 29 40 49 49 46 36 21 2 4 25
COLD BAY 28 28 29 32 38 44 49 50 46 39 34 31 37
FAIRBANKS -7 -8 3 18 31 44 50 47 36 17 -4 -5 19
GULKANA 0 4 16 29 40 47 47 45 36 22 4 3 24
HOMER 24 23 28 34 41 47 48 47 42 33 25 25 35
JUNEAU 27 28 33 39 45 50 49 49 45 38 30 27 38
KING SALMON 17 16 24 31 40 47 52 51 42 31 22 18 33
KODIAK 30 29 31 35 41 47 48 52 47 38 32 30 39
KOTZEBUE -1 -2 0 12 30 42 51 49 39 21 7 2 21
MCGRATH -2 0 11 26 40 50 55 50 41 23 4 1 25
NOME 5 6 10 20 34 44 50 48 40 27 15 9 25
ST. PAUL ISLAND 23 21 21 25 32 37 46 48 44 37 32 29 33
TALKEETNA 12 13 20 29 39 47 55 48 40 28 15 15 30
VALDEZ 22 24 28 35 42 49 52 50 45 35 25 25 36
YAKUTAT 27 28 31 36 43 48 52 52 47 39 30 29 39
ARIZONA
FLAGSTAFF 24 27 29 34 39 45 54 53 48 38 30 25 37
PHOENIX 44 46 49 52 57 62 70 71 66 57 49 44 55
TUCSON 42 44 47 50 55 59 67 69 63 55 46 42 53
WINSLOW 27 31 35 40 45 51 60 59 53 44 34 27 42
YUMA 44 47 49 53 57 63 71 72 67 59 50 44 56
CALIFORNIA
BAKERSFIELD 46 49 52 55 58 58 67 62 58 57 46 40 54
BISHOP 34 36 40 44 49 54 59 53 52 44 37 32 45
BLUE CANYON
EUREKA
FRESNO 44 47 51 54 57 62 66 60 62 56 48 42 54
LONG BEACH 50 52 54 57 59 62 61 62 61 61 54 50 57
LOS ANGELES AP 50 52 54 56 58 61 64 65 64 60 54 49 57
LOS ANGELES CITY
MT SHASTA CITY
OAKLAND (ALAMEDA NAS)46 49 50 51 53 56 57 58 58 56 51 47 53
REDDING 41 44 47 51 56 60 64 62 59 53 46 41 52
RED BLUFF
SACRAMENTO 44 47 50 53 56 60 58 56 54 51 44 39 51
SANDBERG
SAN DIEGO 51 53 54 57 59 61 65 66 65 61 55 50 58
SAN FRANCISCO AP 47 49 50 52 53 55 57 58 57 55 51 46 53
SAN FRANCISCO CI
SANTA BARBARA 47 49 50 53 55 58 61 61 60 57 51 47 54
SANTA MARIA 49 50 52 53 54 53 55 59 59 56 51 44 53
STOCKTON 41 43 49 50 52 57 60 59 55 53 51 39 51
COLORADO
ALAMOSA 21 25 32 38 44 50 56 56 48 37 27 16 37
COLORADO SPRINGS 23 25 29 36 45 52 57 56 49 39 29 24 39
DENVER 24 27 31 38 46 54 58 57 50 41 31 25 40
GRAND JUNCTION 23 30 36 41 48 54 58 58 52 43 33 25 42
PUEBLO 24 28 33 40 49 56 61 60 53 42 32 26 42
HAWAII & PACIFIC ISLANDS
HILO 66 66 67 68 69 70 71 72 72 71 70 67 69
HONOLULU 66 66 67 68 69 70 72 72 73 72 70 68 69
KAHULUI 67 67 67 68 69 71 67 67 67 67 66 63 67
LIHUE 66 66 67 68 69 72 73 73 73 72 70 68 70
GUAM 74 74 74 75 76 77 77 77 77 77 77 76 76
JOHNSTON
KOROR 77 77 77 78 78 78 78 78 78 78 78 78 78
KWAJALEIN 76 76 76 77 78 78 78 78 78 78 78 77 77
MAJURO 77 76 77 77 78 78 77 77 77 77 78 77 77
PAGO PAGO 78 78 78 78 77 76 75 75 76 77 77 78 77
PONAPE 76 76 76 77 77 77 77 77 77 77 77 77 77
TRUK (CHUUK) 77 76 77 77 78 78 78 78 78 78 78 77 77
WAKE 71 70 72 73 74 76 77 77 78 77 75 73 74
YAP 76 76 76 77 78 78 78 78 78 78 78 77 77
IDAHO
BOISE 27 31 38 43 49 54 58 56 51 42 35 26 42
LEWISTON 32 34 41 46 52 56 60 59 54 42 38 28 45
POCATELLO 22 26 33 39 46 52 56 54 48 40 31 19 39
MONTANA
BILLINGS 22 24 31 39 47 54 58 57 49 40 27 22 39
GLASGOW 10 16 26 37 47 54 58 56 48 38 25 15 36
GREAT FALLS 18 23 27 36 44 51 55 54 47 39 29 22 37
HAVRE 12 19 27 37 46 53 56 55 47 37 26 17 36
HELENA 16 22 27 36 44 50 54 53 46 38 28 20 36
KALISPELL 20 24 29 37 45 51 55 54 46 37 29 22 38
MILES CITY 14 20 28 38 48 56 60 58 49 40 28 19 38
MISSOULA 22 25 33 39 46 52 56 54 48 39 30 21 39
NEVADA
ELKO 20 26 33 38 43 49 48 47 41 33 26 19 35
ELY 21 25 29 33 40 46 51 50 44 36 28 21 35
LAS VEGAS 38 41 45 49 54 59 64 60 58 47 42 34 49
RENO 29 32 36 40 45 51 55 54 49 42 34 26 41
WINNEMUCCA 27 31 33 37 44 50 54 52 46 38 32 27 39
NEW MEXICO
ALBUQUERQUE 30 34 37 42 49 55 60 61 55 46 36 30 44
CLAYTON 27 30 34 40 49 57 62 61 54 44 34 29 44
ROSWELL 33 37 41 47 55 62 60 61 60 51 40 34 48
OREGON
ASTORIA 40 42 43 45 49 53 56 57 55 50 45 41 48
BURNS
EUGENE 39 41 44 47 51 55 59 58 52 49 44 35 48
MEACHAM
MEDFORD 37 40 43 47 51 55 60 59 55 48 41 36 48
PENDLETON 32 34 40 44 49 54 57 56 52 44 38 28 44
PORTLAND 39 40 44 48 52 56 56 57 54 51 44 35 48
SALEM 36 37 41 44 48 51 59 54 55 46 44 35 46
SEXTON SUMMIT
UTAH
MILFORD 25 29 34 40 46 51 57 56 50 42 33 27 41
SALT LAKE CITY 26 30 37 43 50 55 60 60 53 44 35 27 43
WENDOVER 25 28 34 40 47 53 59 57 51 42 33 26 42
WASHINGTON
OLYMPIA 38 39 42 45 50 54 58 54 54 44 42 35 46
QUILLAYUTE 40 40 42 45 49 52 56 56 54 48 43 37 47
SEATTLE-TACOMA AP 39 40 43 46 51 54 58 58 55 49 43 38 48
SEATTLE URBAN SITE
SPOKANE 27 30 36 41 47 52 56 51 50 41 33 26 41
STAMPEDE PASS
WALLA WALLA
YAKIMA 28 32 39 44 50 54 59 54 52 43 32 27 43
WYOMING
CASPER 21 23 30 36 45 52 56 54 47 35 28 22 37
CHEYENNE 23 24 29 35 45 52 52 52 44 35 26 21 36
LANDER 17 21 29 36 44 51 55 53 46 37 26 16 36
SHERIDAN 21 23 31 38 47 55 55 53 46 36 26 19 37