555
CDUS46 KSEW 310217
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
617 PM PST TUE DEC 30 2025
...............................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR DECEMBER 30 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 49 243 PM 56 1945 47 2 45
1958
2023
MINIMUM 34 628 AM 6 1968 37 -3 39
AVERAGE 42 42 0 42
PRECIPITATION (IN)
TODAY 0.00 1.06 1980 0.18 -0.18 0.01
MONTH TO DATE 7.37 5.54 1.83 5.50
SINCE OCT 1 16.78 15.76 1.02 13.40
SINCE JAN 1 33.05 39.16 -6.11 32.18
SNOWFALL (IN)
TODAY 0.0 3.7 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 23 23 0 23
MONTH TO DATE 577 686 -109 621
SINCE DEC 1 577 686 -109 621
SINCE JUL 1 1491 1747 -256 1662
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 6 RESULTANT WIND DIRECTION N (360)
HIGHEST WIND SPEED 12 HIGHEST WIND DIRECTION N (10)
HIGHEST GUST SPEED 15 HIGHEST GUST DIRECTION N (20)
AVERAGE WIND SPEED 7.2
SKY COVER
AVERAGE SKY COVER 0.4
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 92 100 AM
LOWEST 63 1100 AM
AVERAGE 78
......................................................
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 47 56 1963
1996
MINIMUM TEMPERATURE (F) 37 13 1968
1978
SUNRISE AND SUNSET
DECEMBER 30 2025......SUNRISE 757 AM PST SUNSET 427 PM PST
DECEMBER 31 2025......SUNRISE 757 AM PST SUNSET 428 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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