451
CDUS46 KSEW 100117
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
617 PM PDT SUN AUG 09 2026
...............................
..THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR AUGUST 9 2026
VALID TODAY AS OF 0500 PM LOCAL TIME.
CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1945 TO 2026
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...............................................................
TEMPERATURE (F)
TODAY
MAXIMUM 77 454 PM 99 1960 79 -2 81
1981
MINIMUM 55 533 AM 47 1950 58 -3 58
AVERAGE 66 68 -2 70
PRECIPITATION (IN)
TODAY 0.00 0.61 1957 0.02 -0.02 0.00
1991
MONTH TO DATE T 0.20 -0.20 0.16
SINCE OCT 1 36.35 36.96 -0.61 27.93
SINCE JAN 1 19.57 21.02 -1.45 14.53
SNOWFALL (IN)
TODAY 0.0 MM MM 0.0
MONTH TO DATE 0.0 0.0
SINCE OCT 1 3.0 2.3
SINCE JUL 1 0.0 0.0
SNOW DEPTH 0
DEGREE DAYS
HEATING
TODAY 0 1 -1 0
MONTH TO DATE 1 2 -1 2
SINCE JUN 1 116 151 -35 117
SINCE JUL 1 21 33 -12 23
COOLING
TODAY 1 4 -3 5
MONTH TO DATE 37 36 1 12
SINCE JUN 1 195 161 34 173
SINCE JAN 1 205 171 34 176
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WIND (MPH)
RESULTANT WIND SPEED 2 RESULTANT WIND DIRECTION W (250)
HIGHEST WIND SPEED 10 HIGHEST WIND DIRECTION W (270)
HIGHEST GUST SPEED 15 HIGHEST GUST DIRECTION W (270)
AVERAGE WIND SPEED 4.4
SKY COVER
AVERAGE SKY COVER 0.5
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 700 AM
LOWEST 43 200 PM
AVERAGE 68
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THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 78 98 1981
MINIMUM TEMPERATURE (F) 58 46 1954
SUNRISE AND SUNSET
AUGUST 9 2026........SUNRISE 558 AM PDT SUNSET 831 PM PDT
AUGUST 10 2026........SUNRISE 559 AM PDT SUNSET 829 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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