056
CDUS46 KSEW 010121
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
621 PM PDT TUE SEP 30 2025
...............................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 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 70 109 PM 82 1992 67 3 67
MINIMUM 52 623 AM 36 1950 51 1 48
AVERAGE 61 59 2 58
PRECIPITATION (IN)
TODAY T 1.65 1953 0.08 -0.08 0.00
MONTH TO DATE 0.70 1.61 -0.91 0.62
SINCE OCT 1 29.61 39.34 -9.73 35.93
SINCE JAN 1 16.21 23.40 -7.19 18.78
SNOWFALL (IN)
TODAY MM 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 MM
DEGREE DAYS
HEATING
TODAY 4 6 -2 7
MONTH TO DATE 51 103 -52 106
SINCE SEP 1 51 103 -52 106
SINCE JUL 1 75 158 -83 144
COOLING
TODAY 0 0 0 0
MONTH TO DATE 34 30 4 42
SINCE SEP 1 34 30 4 42
SINCE JAN 1 328 263 65 315
...............................................................
WIND (MPH)
RESULTANT WIND SPEED 5 RESULTANT WIND DIRECTION S (160)
HIGHEST WIND SPEED 24 HIGHEST WIND DIRECTION SW (230)
HIGHEST GUST SPEED 36 HIGHEST GUST DIRECTION SW (210)
AVERAGE WIND SPEED 6.0
SKY COVER
AVERAGE SKY COVER 0.6
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
LIGHT RAIN
RELATIVE HUMIDITY (PERCENT)
HIGHEST 97 600 AM
LOWEST 38 400 PM
AVERAGE 68
......................................................
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 66 89 1987
MINIMUM TEMPERATURE (F) 51 35 1950
SUNRISE AND SUNSET
SEPTEMBER 30 2025.....SUNRISE 707 AM PDT SUNSET 650 PM PDT
OCTOBER 1 2025.......SUNRISE 709 AM PDT SUNSET 648 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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