775
CDUS46 KSEW 200826
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
126 AM PDT SUN SEP 20 2026
...............................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 19 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 63 529 PM 82 1999 71 -8 76
MINIMUM 52 435 AM 40 1947 53 -1 51
1957
AVERAGE 58 62 -4 64
PRECIPITATION (IN)
YESTERDAY 0.00 0.79 1959 0.06 -0.06 0.00
MONTH TO DATE 1.03 0.91 0.12 0.06
SINCE OCT 1 37.94 38.64 -0.70 28.97
SINCE JAN 1 21.16 22.70 -1.54 15.57
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 7 4 3 1
MONTH TO DATE 56 47 9 14
SINCE SEP 1 56 47 9 14
SINCE JUL 1 81 102 -21 38
COOLING
YESTERDAY 0 1 -1 0
MONTH TO DATE 2 28 -26 34
SINCE SEP 1 2 28 -26 34
SINCE JAN 1 267 261 6 328
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WIND (MPH)
RESULTANT WIND SPEED 2 RESULTANT WIND DIRECTION SW (220)
HIGHEST WIND SPEED 7 HIGHEST WIND DIRECTION N (340)
HIGHEST GUST SPEED 10 HIGHEST GUST DIRECTION W (260)
AVERAGE WIND SPEED 3.2
SKY COVER
AVERAGE SKY COVER 0.6
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 97 1000 AM
LOWEST 72 400 PM
AVERAGE 85
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THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 71 88 1974
MINIMUM TEMPERATURE (F) 53 40 1949
SUNRISE AND SUNSET
SEPTEMBER 20 2026.....SUNRISE 654 AM PDT SUNSET 711 PM PDT
SEPTEMBER 21 2026.....SUNRISE 655 AM PDT SUNSET 709 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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