666
CDUS46 KSEW 090839
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
139 AM PDT SAT AUG 09 2025
...............................
..THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR AUGUST 8 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
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TEMPERATURE (F)
YESTERDAY
MAXIMUM 77 403 PM 98 1960 79 -2 87
MINIMUM 54 411 AM 47 1974 58 -4 57
AVERAGE 66 68 -2 72
PRECIPITATION (IN)
YESTERDAY 0.00 0.13 1953 0.03 -0.03 0.00
MONTH TO DATE 0.16 0.18 -0.02 0.00
SINCE OCT 1 27.93 36.94 -9.01 33.65
SINCE JAN 1 14.53 21.00 -6.47 16.50
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 1 -1 0
MONTH TO DATE 2 1 1 2
SINCE JUN 1 117 150 -33 141
SINCE JUL 1 23 32 -9 9
COOLING
YESTERDAY 1 4 -3 7
MONTH TO DATE 7 32 -25 42
SINCE JUN 1 168 157 11 225
SINCE JAN 1 171 167 4 232
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WIND (MPH)
RESULTANT WIND SPEED 6 RESULTANT WIND DIRECTION N (10)
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION W (280)
HIGHEST GUST SPEED 23 HIGHEST GUST DIRECTION NW (320)
AVERAGE WIND SPEED 8.1
SKY COVER
AVERAGE SKY COVER 0.4
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 83 400 AM
LOWEST 33 500 PM
AVERAGE 58
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THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 79 99 1960
1981
MINIMUM TEMPERATURE (F) 58 47 1950
SUNRISE AND SUNSET
AUGUST 9 2025........SUNRISE 558 AM PDT SUNSET 830 PM PDT
AUGUST 10 2025........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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