428
CDUS46 KSEW 150933
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
133 AM PST MON DEC 15 2025
...............................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR DECEMBER 14 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 53 326 PM 59 2002 47 6 50
MINIMUM 46 159 AM 18 1945 37 9 39
AVERAGE 50 42 8 45
PRECIPITATION (IN)
YESTERDAY 0.06 1.67 1979 0.18 -0.12 0.12
MONTH TO DATE 4.54 2.61 1.93 1.26
SINCE OCT 1 13.95 12.83 1.12 9.16
SINCE JAN 1 30.22 36.23 -6.01 27.94
SNOWFALL (IN)
YESTERDAY 0.0 0.7 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 15 23 -8 20
MONTH TO DATE 228 315 -87 333
SINCE DEC 1 228 315 -87 333
SINCE JUL 1 1142 1376 -234 1374
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 5 RESULTANT WIND DIRECTION S (180)
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION S (180)
HIGHEST GUST SPEED 20 HIGHEST GUST DIRECTION S (180)
AVERAGE WIND SPEED 6.0
SKY COVER
AVERAGE SKY COVER 0.9
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 96 800 PM
LOWEST 77 500 AM
AVERAGE 87
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THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 47 63 1980
MINIMUM TEMPERATURE (F) 37 19 2008
SUNRISE AND SUNSET
DECEMBER 15 2025......SUNRISE 750 AM PST SUNSET 419 PM PST
DECEMBER 16 2025......SUNRISE 751 AM PST SUNSET 419 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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