797
CDUS46 KSEW 210927
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
127 AM PST SUN DEC 21 2025
...............................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR DECEMBER 20 2025...
CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1945 TO 2025
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...............................................................
TEMPERATURE (F)
YESTERDAY
MAXIMUM 45 327 PM 59 2018 46 -1 59
2024
MINIMUM 40 159 AM 14 1990 37 3 45
2008
AVERAGE 43 42 1 52
PRECIPITATION (IN)
YESTERDAY 0.29 3.25 2019 0.18 0.11 T
MONTH TO DATE 7.63 3.68 3.95 2.91
SINCE OCT 1 17.04 13.90 3.14 10.81
SINCE JAN 1 33.31 37.30 -3.99 29.59
SNOWFALL (IN)
YESTERDAY 0.0 3.0 2008 0.0
MONTH TO DATE 0.0 0.0
SINCE OCT 1 0.0 0.0
SINCE JUL 1 0.0 0.0
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 22 23 -1 13
MONTH TO DATE 338 453 -115 434
SINCE DEC 1 338 453 -115 434
SINCE JUL 1 1252 1514 -262 1475
COOLING
YESTERDAY 0 0 0 0
MONTH TO DATE 0 0 0 0
SINCE DEC 1 0 0 0 0
SINCE JAN 1 328 263 65 315
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WIND (MPH)
RESULTANT WIND SPEED 13 RESULTANT WIND DIRECTION S (180)
HIGHEST WIND SPEED 25 HIGHEST WIND DIRECTION S (190)
HIGHEST GUST SPEED 34 HIGHEST GUST DIRECTION S (200)
AVERAGE WIND SPEED 13.0
SKY COVER
AVERAGE SKY COVER 1.0
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 97 600 PM
LOWEST 76 1100 AM
AVERAGE 87
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THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 46 59 2020
MINIMUM TEMPERATURE (F) 37 12 1990
SUNRISE AND SUNSET
DECEMBER 21 2025......SUNRISE 754 AM PST SUNSET 421 PM PST
DECEMBER 22 2025......SUNRISE 755 AM PST SUNSET 422 PM PST
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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