164
CDUS46 KSEW 210827
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
127 AM PDT MON SEP 21 2020
...................................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 20 2020...
CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1945 TO 2020
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
..................................................................
TEMPERATURE (F)
YESTERDAY
MAXIMUM 71 MM 88 1974 69 2 69
MINIMUM 58 MM 40 1949 51 7 58
AVERAGE 65 60 5 64
PRECIPITATION (IN)
YESTERDAY 0.07 1.05 1972 0.06 0.01 T
MONTH TO DATE 0.46 0.89 -0.43 2.53
SINCE OCT 1 37.83 36.88 0.95 35.03
SINCE JAN 1 24.49 21.48 3.01 19.75
DEGREE DAYS
HEATING
YESTERDAY 0 5 -5 1
MONTH TO DATE 24 66 -42 26
SINCE SEP 1 24 66 -42 26
SINCE JUL 1 59 151 -92 39
COOLING
YESTERDAY 0 0 0 0
MONTH TO DATE 67 19 48 32
SINCE SEP 1 67 19 48 32
SINCE JAN 1 328 187 141 323
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WIND (MPH)
RESULTANT WIND SPEED 2 RESULTANT WIND DIRECTION S (190)
HIGHEST WIND SPEED 8 HIGHEST WIND DIRECTION W (260)
HIGHEST GUST SPEED MM HIGHEST GUST DIRECTION MM
AVERAGE WIND SPEED 3.6
SKY COVER
AVERAGE SKY COVER 0.7
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 100 700 AM
LOWEST 53 500 PM
AVERAGE 77
..........................................................
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 69 88 1974
1952
MINIMUM TEMPERATURE (F) 51 39 1960
SUNRISE AND SUNSET
SEPTEMBER 21 2020.....SUNRISE 655 AM PDT SUNSET 708 PM PDT
SEPTEMBER 22 2020.....SUNRISE 657 AM PDT SUNSET 706 PM PDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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