529
CDUS46 KSEW 240117
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
617 PM PDT TUE SEP 23 2025
...............................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 23 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 76 206 PM 84 1947 69 7 73
MINIMUM 51 548 AM 40 1948 52 -1 60
AVERAGE 64 61 3 67
PRECIPITATION (IN)
TODAY 0.00 1.08 2020 0.06 -0.06 T
MONTH TO DATE 0.49 1.13 -0.64 0.41
SINCE OCT 1 29.40 38.86 -9.46 35.72
SINCE JAN 1 16.00 22.92 -6.92 18.57
SNOWFALL (IN)
TODAY 0.0 MM MM 0.0
MONTH TO DATE 0.0 0.0
SINCE OCT 1 2.3 0.3
SINCE JUL 1 0.0 0.0
SNOW DEPTH 0
DEGREE DAYS
HEATING
TODAY 1 5 -4 0
MONTH TO DATE 22 64 -42 65
SINCE SEP 1 22 64 -42 65
SINCE JUL 1 46 119 -73 103
COOLING
TODAY 0 0 0 2
MONTH TO DATE 34 30 4 39
SINCE SEP 1 34 30 4 39
SINCE JAN 1 328 263 65 312
...............................................................
WIND (MPH)
RESULTANT WIND SPEED 5 RESULTANT WIND DIRECTION N (340)
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION NW (330)
HIGHEST GUST SPEED 16 HIGHEST GUST DIRECTION N (350)
AVERAGE WIND SPEED 6.6
SKY COVER
AVERAGE SKY COVER 0.1
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
HAZE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 89 600 AM
LOWEST 43 300 PM
AVERAGE 66
......................................................
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 69 89 1974
MINIMUM TEMPERATURE (F) 52 38 1948
SUNRISE AND SUNSET
SEPTEMBER 23 2025.....SUNRISE 658 AM PDT SUNSET 704 PM PDT
SEPTEMBER 24 2025.....SUNRISE 659 AM PDT SUNSET 702 PM PDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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