108
CDUS46 KSEW 190223
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
623 PM PST THU DEC 18 2025
...............................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR DECEMBER 18 2025...
VALID TODAY AS OF 0500 PM LOCAL TIME.
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)
TODAY
MAXIMUM 50 459 PM 55 2024 47 3 55
MINIMUM 42 1151 AM 18 1964 37 5 46
AVERAGE 46 42 4 51
PRECIPITATION (IN)
TODAY 0.32 1.23 1960 0.18 0.14 0.33
MONTH TO DATE 7.23 3.32 3.91 2.70
SINCE OCT 1 16.64 13.54 3.10 10.60
SINCE JAN 1 32.91 36.94 -4.03 29.38
SNOWFALL (IN)
TODAY 0.0 5.1 1968 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
TODAY 19 23 -4 14
MONTH TO DATE 292 407 -115 406
SINCE DEC 1 292 407 -115 406
SINCE JUL 1 1206 1468 -262 1447
COOLING
TODAY 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
...............................................................
WIND (MPH)
RESULTANT WIND SPEED 9 RESULTANT WIND DIRECTION S (160)
HIGHEST WIND SPEED 24 HIGHEST WIND DIRECTION S (190)
HIGHEST GUST SPEED 36 HIGHEST GUST DIRECTION S (200)
AVERAGE WIND SPEED 10.4
SKY COVER
AVERAGE SKY COVER 1.0
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
RAIN
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 97 300 PM
LOWEST 70 600 AM
AVERAGE 84
......................................................
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 46 56 1969
1994
MINIMUM TEMPERATURE (F) 37 17 1949
1990
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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