224
CDUS46 KSEW 220130
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
630 PM PDT THU AUG 21 2025
...............................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR AUGUST 21 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 78 357 PM 91 2018 77 1 70
MINIMUM 53 529 AM 44 1947 57 -4 58
AVERAGE 66 67 -1 64
PRECIPITATION (IN)
TODAY 0.00 0.70 1989 0.03 -0.03 0.00
MONTH TO DATE 1.14 0.58 0.56 0.64
SINCE OCT 1 28.91 37.34 -8.43 34.29
SINCE JAN 1 15.51 21.40 -5.89 17.14
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 1 -1 1
MONTH TO DATE 2 14 -12 5
SINCE JUN 1 117 163 -46 144
SINCE JUL 1 23 45 -22 12
COOLING
TODAY 1 3 -2 0
MONTH TO DATE 67 76 -9 69
SINCE JUN 1 228 201 27 252
SINCE JAN 1 231 211 20 259
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WIND (MPH)
RESULTANT WIND SPEED 10 RESULTANT WIND DIRECTION N (10)
HIGHEST WIND SPEED 18 HIGHEST WIND DIRECTION NE (30)
HIGHEST GUST SPEED 23 HIGHEST GUST DIRECTION N (20)
AVERAGE WIND SPEED 10.3
SKY COVER
AVERAGE SKY COVER 0.2
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 67 800 AM
LOWEST 39 300 PM
AVERAGE 53
......................................................
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 77 89 2018
MINIMUM TEMPERATURE (F) 57 45 1960
SUNRISE AND SUNSET
AUGUST 21 2025........SUNRISE 614 AM PDT SUNSET 810 PM PDT
AUGUST 22 2025........SUNRISE 615 AM PDT SUNSET 808 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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