609
CDUS46 KSEW 230826
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
126 AM PDT TUE SEP 23 2025
...............................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 22 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 71 237 PM 92 1990 70 1 70
MINIMUM 52 615 AM 37 1955 53 -1 51
AVERAGE 62 61 1 61
PRECIPITATION (IN)
YESTERDAY 0.00 1.65 1978 0.05 -0.05 0.00
MONTH TO DATE 0.49 1.07 -0.58 0.41
SINCE OCT 1 29.40 38.80 -9.40 35.72
SINCE JAN 1 16.00 22.86 -6.86 18.57
SNOWFALL (IN)
YESTERDAY 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
YESTERDAY 3 4 -1 4
MONTH TO DATE 21 59 -38 65
SINCE SEP 1 21 59 -38 65
SINCE JUL 1 45 114 -69 103
COOLING
YESTERDAY 0 0 0 0
MONTH TO DATE 34 30 4 37
SINCE SEP 1 34 30 4 37
SINCE JAN 1 328 263 65 310
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WIND (MPH)
RESULTANT WIND SPEED 1 RESULTANT WIND DIRECTION NW (300)
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION W (290)
HIGHEST GUST SPEED 16 HIGHEST GUST DIRECTION W (290)
AVERAGE WIND SPEED 5.4
SKY COVER
AVERAGE SKY COVER 0.1
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 500 AM
LOWEST 47 400 PM
AVERAGE 70
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THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 69 84 1947
MINIMUM TEMPERATURE (F) 52 40 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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