417
CDUS46 KSEW 190827
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
127 AM PDT WED AUG 19 2026
...............................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR AUGUST 18 2026...
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)
YESTERDAY
MAXIMUM 80 426 PM 88 1991 78 2 75
MINIMUM 57 743 AM 47 1951 57 0 58
AVERAGE 69 67 2 67
PRECIPITATION (IN)
YESTERDAY 0.00 1.63 1975 0.04 -0.04 0.00
MONTH TO DATE T 0.48 -0.48 1.14
SINCE OCT 1 36.35 37.24 -0.89 28.91
SINCE JAN 1 19.57 21.30 -1.73 15.51
SNOWFALL (IN)
YESTERDAY 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
YESTERDAY 0 1 -1 0
MONTH TO DATE 1 11 -10 2
SINCE JUN 1 116 160 -44 117
SINCE JUL 1 21 42 -21 23
COOLING
YESTERDAY 4 3 1 2
MONTH TO DATE 58 67 -9 61
SINCE JUN 1 216 192 24 222
SINCE JAN 1 226 202 24 225
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WIND (MPH)
RESULTANT WIND SPEED 6 RESULTANT WIND DIRECTION SW (210)
HIGHEST WIND SPEED 12 HIGHEST WIND DIRECTION S (200)
HIGHEST GUST SPEED 18 HIGHEST GUST DIRECTION S (190)
AVERAGE WIND SPEED 6.2
SKY COVER
AVERAGE SKY COVER 0.4
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
FOG
HAZE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 96 600 AM
LOWEST 45 600 PM
AVERAGE 71
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THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 77 95 2016
MINIMUM TEMPERATURE (F) 57 47 1945
1947
SUNRISE AND SUNSET
AUGUST 19 2026........SUNRISE 611 AM PDT SUNSET 814 PM PDT
AUGUST 20 2026........SUNRISE 612 AM PDT SUNSET 812 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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