867
CDUS46 KSEW 170826
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
126 AM PDT MON AUG 17 2026
...............................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR AUGUST 16 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 75 353 PM 98 1967 78 -3 74
2020
MINIMUM 58 1159 PM 47 1946 57 1 59
AVERAGE 67 68 -1 67
PRECIPITATION (IN)
YESTERDAY 0.00 0.41 1995 0.03 -0.03 T
MONTH TO DATE T 0.41 -0.41 1.14
SINCE OCT 1 36.35 37.17 -0.82 28.91
SINCE JAN 1 19.57 21.23 -1.66 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 9 -8 2
SINCE JUN 1 116 158 -42 117
SINCE JUL 1 21 40 -19 23
COOLING
YESTERDAY 2 3 -1 2
MONTH TO DATE 52 61 -9 57
SINCE JUN 1 210 186 24 218
SINCE JAN 1 220 196 24 221
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WIND (MPH)
RESULTANT WIND SPEED 3 RESULTANT WIND DIRECTION SW (240)
HIGHEST WIND SPEED 9 HIGHEST WIND DIRECTION W (270)
HIGHEST GUST SPEED 13 HIGHEST GUST DIRECTION W (260)
AVERAGE WIND SPEED 5.3
SKY COVER
AVERAGE SKY COVER 0.8
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 87 1100 PM
LOWEST 51 400 PM
AVERAGE 69
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THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 78 96 1977
MINIMUM TEMPERATURE (F) 57 45 1951
SUNRISE AND SUNSET
AUGUST 17 2026........SUNRISE 608 AM PDT SUNSET 817 PM PDT
AUGUST 18 2026........SUNRISE 610 AM PDT SUNSET 815 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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