344
CDUS46 KSEW 200827
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
127 AM PDT WED AUG 20 2025
...............................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR AUGUST 19 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 75 237 PM 95 2016 77 -2 77
MINIMUM 59 552 AM 47 1945 57 2 56
1947
AVERAGE 67 67 0 67
PRECIPITATION (IN)
YESTERDAY 0.00 0.88 1965 0.03 -0.03 T
MONTH TO DATE 1.14 0.51 0.63 0.47
SINCE OCT 1 28.91 37.27 -8.36 34.12
SINCE JAN 1 15.51 21.33 -5.82 16.97
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 12 -10 2
SINCE JUN 1 117 161 -44 141
SINCE JUL 1 23 43 -20 9
COOLING
YESTERDAY 2 3 -1 2
MONTH TO DATE 63 70 -7 69
SINCE JUN 1 224 195 29 252
SINCE JAN 1 227 205 22 259
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WIND (MPH)
RESULTANT WIND SPEED 4 RESULTANT WIND DIRECTION SW (210)
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION SW (230)
HIGHEST GUST SPEED 18 HIGHEST GUST DIRECTION SW (240)
AVERAGE WIND SPEED 6.9
SKY COVER
AVERAGE SKY COVER 0.7
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 78 500 AM
LOWEST 43 100 PM
AVERAGE 61
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THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 77 91 2016
MINIMUM TEMPERATURE (F) 57 45 1945
SUNRISE AND SUNSET
AUGUST 20 2025........SUNRISE 613 AM PDT SUNSET 811 PM PDT
AUGUST 21 2025........SUNRISE 614 AM PDT SUNSET 810 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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