939
CDUS46 KSEW 210116
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
616 PM PDT THU AUG 20 2026
...............................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR AUGUST 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 86 440 PM 91 2016 77 9 75
MINIMUM 59 512 AM 45 1945 57 2 60
AVERAGE 73 67 6 68
PRECIPITATION (IN)
TODAY 0.00 0.70 2008 0.04 -0.04 0.00
MONTH TO DATE T 0.55 -0.55 1.14
SINCE OCT 1 36.35 37.31 -0.96 28.91
SINCE JAN 1 19.57 21.37 -1.80 15.51
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 0.0 0.0
SNOW DEPTH 0
DEGREE DAYS
HEATING
TODAY 0 1 -1 0
MONTH TO DATE 1 13 -12 2
SINCE JUN 1 116 162 -46 117
SINCE JUL 1 21 44 -23 23
COOLING
TODAY 8 3 5 3
MONTH TO DATE 70 73 -3 66
SINCE JUN 1 228 198 30 227
SINCE JAN 1 238 208 30 230
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WIND (MPH)
RESULTANT WIND SPEED 5 RESULTANT WIND DIRECTION NW (320)
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION NW (300)
HIGHEST GUST SPEED 17 HIGHEST GUST DIRECTION W (290)
AVERAGE WIND SPEED 6.9
SKY COVER
AVERAGE SKY COVER 0.1
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 83 500 AM
LOWEST 38 400 PM
AVERAGE 61
......................................................
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 77 91 2018
MINIMUM TEMPERATURE (F) 57 44 1947
SUNRISE AND SUNSET
AUGUST 20 2026........SUNRISE 612 AM PDT SUNSET 812 PM PDT
AUGUST 21 2026........SUNRISE 614 AM PDT SUNSET 810 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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