429
CDUS46 KSEW 130927
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
127 AM PST SAT DEC 13 2025
...............................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR DECEMBER 12 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 55 517 PM 60 1960 47 8 46
1995
MINIMUM 45 253 AM 22 1972 37 8 36
AVERAGE 50 42 8 41
PRECIPITATION (IN)
YESTERDAY 0.04 2.19 2010 0.18 -0.14 0.03
MONTH TO DATE 4.48 2.25 2.23 0.62
SINCE OCT 1 13.89 12.47 1.42 8.52
SINCE JAN 1 30.16 35.87 -5.71 27.30
SNOWFALL (IN)
YESTERDAY 0.0 2.6 1975 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 24
MONTH TO DATE 197 269 -72 292
SINCE DEC 1 197 269 -72 292
SINCE JUL 1 1111 1330 -219 1333
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 4 RESULTANT WIND DIRECTION S (180)
HIGHEST WIND SPEED 10 HIGHEST WIND DIRECTION S (160)
HIGHEST GUST SPEED 16 HIGHEST GUST DIRECTION S (160)
AVERAGE WIND SPEED 3.8
SKY COVER
AVERAGE SKY COVER 0.9
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
LIGHT RAIN
FOG
FOG W/VISIBILITY <= 1/4 MILE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 100 100 AM
LOWEST 89 900 PM
AVERAGE 95
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THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 47 59 1952
MINIMUM TEMPERATURE (F) 37 19 1972
SUNRISE AND SUNSET
DECEMBER 13 2025......SUNRISE 749 AM PST SUNSET 418 PM PST
DECEMBER 14 2025......SUNRISE 750 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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