581
CDUS46 KSEW 210116
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
616 PM PDT MON APR 20 2026
...............................
..THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR APRIL 20 2026
VALID TODAY AS OF 0500 PM LOCAL TIME.
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)
TODAY
MAXIMUM 72 419 PM 81 2016 60 12 58
MINIMUM 54 553 AM 30 1961 44 10 45
AVERAGE 63 52 11 52
PRECIPITATION (IN)
TODAY 0.00 0.49 1946 0.10 -0.10 0.38
MONTH TO DATE 2.22 2.28 -0.06 2.36
SINCE OCT 1 32.90 31.93 0.97 26.32
SINCE JAN 1 16.12 15.99 0.13 12.92
SNOWFALL (IN)
TODAY 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
TODAY 2 13 -11 13
MONTH TO DATE 262 293 -31 264
SINCE MAR 1 847 850 -3 810
SINCE JUL 1 3597 3897 -300 3967
COOLING
TODAY 0 0 0 0
MONTH TO DATE 0 0 0 0
SINCE MAR 1 0 0 0 0
SINCE JAN 1 0 0 0 0
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WIND (MPH)
RESULTANT WIND SPEED 6 RESULTANT WIND DIRECTION N (20)
HIGHEST WIND SPEED 18 HIGHEST WIND DIRECTION NE (30)
HIGHEST GUST SPEED 23 HIGHEST GUST DIRECTION NE (30)
AVERAGE WIND SPEED 7.6
SKY COVER
AVERAGE SKY COVER 0.8
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 60 1200 AM
LOWEST 38 400 PM
AVERAGE 49
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THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 60 76 1982
MINIMUM TEMPERATURE (F) 44 29 1951
SUNRISE AND SUNSET
APRIL 20 2026.........SUNRISE 611 AM PDT SUNSET 806 PM PDT
APRIL 21 2026.........SUNRISE 609 AM PDT SUNSET 807 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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