835
CDUS46 KSEW 090119
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
619 PM PDT MON SEP 08 2025
...............................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 8 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 75 416 PM 85 1993 74 1 75
2011
MINIMUM 58 541 AM 43 1950 55 3 58
AVERAGE 67 64 3 67
PRECIPITATION (IN)
TODAY 0.00 0.60 1979 0.05 -0.05 0.00
1994
MONTH TO DATE 0.05 0.35 -0.30 T
SINCE OCT 1 28.96 38.08 -9.12 35.31
SINCE JAN 1 15.56 22.14 -6.58 18.16
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 0 2 -2 0
MONTH TO DATE 1 16 -15 0
SINCE SEP 1 1 16 -15 0
SINCE JUL 1 25 71 -46 38
COOLING
TODAY 2 2 0 2
MONTH TO DATE 21 16 5 37
SINCE SEP 1 21 16 5 37
SINCE JAN 1 315 249 66 310
...............................................................
WIND (MPH)
RESULTANT WIND SPEED 3 RESULTANT WIND DIRECTION W (280)
HIGHEST WIND SPEED 10 HIGHEST WIND DIRECTION NW (300)
HIGHEST GUST SPEED 15 HIGHEST GUST DIRECTION W (270)
AVERAGE WIND SPEED 3.9
SKY COVER
AVERAGE SKY COVER 0.8
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
HAZE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 90 500 AM
LOWEST 51 200 PM
AVERAGE 71
......................................................
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 74 89 1963
MINIMUM TEMPERATURE (F) 55 40 1952
SUNRISE AND SUNSET
SEPTEMBER 8 2025.....SUNRISE 638 AM PDT SUNSET 735 PM PDT
SEPTEMBER 9 2025.....SUNRISE 639 AM PDT SUNSET 733 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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