Climatological Report (Daily)
Issued by NWS
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CDUS46 KSEW 210826
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
126 AM PDT THU AUG 21 2025
...................................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR AUGUST 20 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 75 421 PM 91 2016 77 -2 68
MINIMUM 60 1159 PM 45 1945 57 3 58
AVERAGE 68 67 1 63
PRECIPITATION (IN)
YESTERDAY 0.00 0.70 2008 0.04 -0.04 0.17
MONTH TO DATE 1.14 0.55 0.59 0.64
SINCE OCT 1 28.91 37.31 -8.40 34.29
SINCE JAN 1 15.51 21.37 -5.86 17.14
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 2
MONTH TO DATE 2 13 -11 4
SINCE JUN 1 117 162 -45 143
SINCE JUL 1 23 44 -21 11
COOLING
YESTERDAY 3 3 0 0
MONTH TO DATE 66 73 -7 69
SINCE JUN 1 227 198 29 252
SINCE JAN 1 230 208 22 259
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 8 RESULTANT WIND DIRECTION N (10)
HIGHEST WIND SPEED 17 HIGHEST WIND DIRECTION N (20)
HIGHEST GUST SPEED 21 HIGHEST GUST DIRECTION N (20)
AVERAGE WIND SPEED 10.5
SKY COVER
AVERAGE SKY COVER 0.5
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 78 100 AM
LOWEST 35 700 PM
AVERAGE 57
..........................................................
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 77 91 2018
MINIMUM TEMPERATURE (F) 57 44 1947
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.
$$