769
CDUS46 KSEW 180926
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
126 AM PST THU DEC 18 2025
...............................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR DECEMBER 17 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 52 1220 AM 57 1994 47 5 56
MINIMUM 42 835 AM 11 1964 37 5 42
AVERAGE 47 42 5 49
PRECIPITATION (IN)
YESTERDAY 0.38 1.61 1979 0.17 0.21 0.88
MONTH TO DATE 6.91 3.14 3.77 2.37
SINCE OCT 1 16.32 13.36 2.96 10.27
SINCE JAN 1 32.59 36.76 -4.17 29.05
SNOWFALL (IN)
YESTERDAY 0.0 0.1 1992 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 18 23 -5 16
MONTH TO DATE 273 384 -111 392
SINCE DEC 1 273 384 -111 392
SINCE JUL 1 1187 1445 -258 1433
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 15 RESULTANT WIND DIRECTION S (200)
HIGHEST WIND SPEED 37 HIGHEST WIND DIRECTION SW (210)
HIGHEST GUST SPEED 51 HIGHEST GUST DIRECTION SW (220)
AVERAGE WIND SPEED 16.8
SKY COVER
AVERAGE SKY COVER 0.7
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
RAIN
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 1200 AM
LOWEST 68 200 PM
AVERAGE 81
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THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 47 55 2024
MINIMUM TEMPERATURE (F) 37 18 1964
SUNRISE AND SUNSET
DECEMBER 18 2025......SUNRISE 752 AM PST SUNSET 420 PM PST
DECEMBER 19 2025......SUNRISE 753 AM PST SUNSET 420 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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