403
CDUS46 KSEW 220117
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
617 PM PDT WED MAY 21 2025
...............................
..THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR MAY 21 2025
VALID TODAY AS OF 0500 PM LOCAL TIME.
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)
TODAY
MAXIMUM 62 417 PM 93 1963 67 -5 52
MINIMUM 49 604 AM 39 1960 50 -1 46
AVERAGE 56 59 -3 49
PRECIPITATION (IN)
TODAY 0.00 0.66 2024 0.06 -0.06 0.66
MONTH TO DATE 0.60 1.32 -0.72 1.20
SINCE OCT 1 27.11 34.15 -7.04 31.96
SINCE JAN 1 13.71 18.21 -4.50 14.81
SNOWFALL (IN)
TODAY 0.0 T 1953 0.0
MONTH TO DATE 0.0 0.0
SINCE OCT 1 2.3 0.3
SINCE JUL 1 2.3 0.3
SNOW DEPTH 0
DEGREE DAYS
HEATING
TODAY 9 7 2 16
MONTH TO DATE 202 181 21 196
SINCE MAR 1 1129 1150 -21 1165
SINCE JUL 1 4286 4197 89 4076
COOLING
TODAY 0 0 0 0
MONTH TO DATE 0 0 0 7
SINCE MAR 1 0 1 -1 7
SINCE JAN 1 0 1 -1 7
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WIND (MPH)
RESULTANT WIND SPEED 4 RESULTANT WIND DIRECTION W (260)
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION W (290)
HIGHEST GUST SPEED 20 HIGHEST GUST DIRECTION W (270)
AVERAGE WIND SPEED 6.4
SKY COVER
AVERAGE SKY COVER 0.8
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 83 1200 AM
LOWEST 42 300 PM
AVERAGE 63
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THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 68 86 1969
MINIMUM TEMPERATURE (F) 50 37 1960
SUNRISE AND SUNSET
MAY 21 2025...........SUNRISE 525 AM PDT SUNSET 847 PM PDT
MAY 22 2025...........SUNRISE 524 AM PDT SUNSET 848 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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