531
CDUS46 KSEW 140827
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
127 AM PDT SUN SEP 14 2025
...............................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 13 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 75 435 PM 87 1999 73 2 64
MINIMUM 57 630 AM 39 1952 54 3 52
AVERAGE 66 63 3 58
PRECIPITATION (IN)
YESTERDAY 0.00 0.51 1955 0.05 -0.05 0.04
MONTH TO DATE 0.06 0.59 -0.53 0.28
SINCE OCT 1 28.97 38.32 -9.35 35.59
SINCE JAN 1 15.57 22.38 -6.81 18.44
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 0 3 -3 7
MONTH TO DATE 5 27 -22 19
SINCE SEP 1 5 27 -22 19
SINCE JUL 1 29 82 -53 57
COOLING
YESTERDAY 1 1 0 0
MONTH TO DATE 22 22 0 37
SINCE SEP 1 22 22 0 37
SINCE JAN 1 316 255 61 310
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WIND (MPH)
RESULTANT WIND SPEED 6 RESULTANT WIND DIRECTION S (200)
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION S (190)
HIGHEST GUST SPEED 22 HIGHEST GUST DIRECTION SW (220)
AVERAGE WIND SPEED 6.5
SKY COVER
AVERAGE SKY COVER 0.5
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 90 600 AM
LOWEST 48 500 PM
AVERAGE 69
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THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 72 93 1979
MINIMUM TEMPERATURE (F) 54 46 1947
1955
1986
SUNRISE AND SUNSET
SEPTEMBER 14 2025.....SUNRISE 646 AM PDT SUNSET 722 PM PDT
SEPTEMBER 15 2025.....SUNRISE 647 AM PDT SUNSET 720 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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