753
CDUS46 KSEW 150826
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
126 AM PDT MON SEP 15 2025
...............................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 14 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 68 157 PM 93 1979 72 -4 66
MINIMUM 57 1159 PM 46 1947 54 3 56
1955
1986
AVERAGE 63 63 0 61
PRECIPITATION (IN)
YESTERDAY T 0.73 1949 0.05 -0.05 0.09
MONTH TO DATE 0.06 0.64 -0.58 0.37
SINCE OCT 1 28.97 38.37 -9.40 35.68
SINCE JAN 1 15.57 22.43 -6.86 18.53
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 2 3 -1 4
MONTH TO DATE 7 30 -23 23
SINCE SEP 1 7 30 -23 23
SINCE JUL 1 31 85 -54 61
COOLING
YESTERDAY 0 1 -1 0
MONTH TO DATE 22 23 -1 37
SINCE SEP 1 22 23 -1 37
SINCE JAN 1 316 256 60 310
...............................................................
WIND (MPH)
RESULTANT WIND SPEED 11 RESULTANT WIND DIRECTION S (200)
HIGHEST WIND SPEED 25 HIGHEST WIND DIRECTION SW (210)
HIGHEST GUST SPEED 33 HIGHEST GUST DIRECTION SW (220)
AVERAGE WIND SPEED 11.1
SKY COVER
AVERAGE SKY COVER 1.0
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
LIGHT RAIN
RELATIVE HUMIDITY (PERCENT)
HIGHEST 83 900 AM
LOWEST 55 200 PM
AVERAGE 69
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THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 72 93 1967
MINIMUM TEMPERATURE (F) 54 42 1952
SUNRISE AND SUNSET
SEPTEMBER 15 2025.....SUNRISE 647 AM PDT SUNSET 720 PM PDT
SEPTEMBER 16 2025.....SUNRISE 648 AM PDT SUNSET 718 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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