306
CDUS46 KSEW 170826
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
126 AM PDT SUN MAY 17 2026
...............................
..THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR MAY 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 59 1243 PM 84 1985 67 -8 59
2008
MINIMUM 44 1159 PM 40 2003 49 -5 48
AVERAGE 52 58 -6 54
PRECIPITATION (IN)
YESTERDAY 0.08 0.64 1988 0.05 0.03 0.03
MONTH TO DATE 0.49 1.03 -0.54 0.18
SINCE OCT 1 33.94 33.86 0.08 26.69
SINCE JAN 1 17.16 17.92 -0.76 13.29
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 3.0 2.3
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 13 8 5 11
MONTH TO DATE 108 146 -38 150
SINCE MAR 1 1064 1115 -51 1077
SINCE JUL 1 3814 4162 -348 4234
COOLING
YESTERDAY 0 0 0 0
MONTH TO DATE 6 0 6 0
SINCE MAR 1 6 1 5 0
SINCE JAN 1 6 1 5 0
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WIND (MPH)
RESULTANT WIND SPEED 5 RESULTANT WIND DIRECTION S (180)
HIGHEST WIND SPEED 18 HIGHEST WIND DIRECTION S (190)
HIGHEST GUST SPEED 25 HIGHEST GUST DIRECTION S (180)
AVERAGE WIND SPEED 8.5
SKY COVER
AVERAGE SKY COVER 0.8
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 300 AM
LOWEST 49 100 PM
AVERAGE 71
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THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 67 90 2008
MINIMUM TEMPERATURE (F) 49 39 1966
2011
SUNRISE AND SUNSET
MAY 17 2026...........SUNRISE 530 AM PDT SUNSET 842 PM PDT
MAY 18 2026...........SUNRISE 529 AM PDT SUNSET 843 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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