424
CDUS46 KSEW 200928
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
128 AM PST SAT DEC 20 2025
...............................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR DECEMBER 19 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 43 152 PM 56 1969 46 -3 55
1994
MINIMUM 38 821 AM 17 1949 37 1 44
1990
AVERAGE 41 42 -1 50
PRECIPITATION (IN)
YESTERDAY 0.09 1.32 2019 0.18 -0.09 0.21
MONTH TO DATE 7.34 3.50 3.84 2.91
SINCE OCT 1 16.75 13.72 3.03 10.81
SINCE JAN 1 33.02 37.12 -4.10 29.59
SNOWFALL (IN)
YESTERDAY 0.0 3.3 1964 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 24 23 1 15
MONTH TO DATE 316 430 -114 421
SINCE DEC 1 316 430 -114 421
SINCE JUL 1 1230 1491 -261 1462
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
...............................................................
WIND (MPH)
RESULTANT WIND SPEED 14 RESULTANT WIND DIRECTION S (190)
HIGHEST WIND SPEED 23 HIGHEST WIND DIRECTION S (200)
HIGHEST GUST SPEED 33 HIGHEST GUST DIRECTION S (200)
AVERAGE WIND SPEED 14.0
SKY COVER
AVERAGE SKY COVER 0.6
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 89 600 PM
LOWEST 70 1200 AM
AVERAGE 80
......................................................
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 46 59 2018
2024
MINIMUM TEMPERATURE (F) 37 14 1990
2008
SUNRISE AND SUNSET
DECEMBER 20 2025......SUNRISE 754 AM PST SUNSET 421 PM PST
DECEMBER 21 2025......SUNRISE 754 AM PST SUNSET 421 PM PST
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page