310
CDUS46 KSEW 240826
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
126 AM PDT THU SEP 24 2026
...............................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 23 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 67 421 PM 84 1947 69 -2 76
MINIMUM 53 631 AM 40 1948 52 1 51
AVERAGE 60 61 -1 64
PRECIPITATION (IN)
YESTERDAY 0.00 1.08 2020 0.06 -0.06 0.00
MONTH TO DATE 1.03 1.13 -0.10 0.49
SINCE OCT 1 37.94 38.86 -0.92 29.40
SINCE JAN 1 21.16 22.92 -1.76 16.00
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 5 5 0 1
MONTH TO DATE 74 64 10 22
SINCE SEP 1 74 64 10 22
SINCE JUL 1 99 119 -20 46
COOLING
YESTERDAY 0 0 0 0
MONTH TO DATE 2 30 -28 34
SINCE SEP 1 2 30 -28 34
SINCE JAN 1 267 263 4 328
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WIND (MPH)
RESULTANT WIND SPEED 2 RESULTANT WIND DIRECTION E (100)
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION N (20)
HIGHEST GUST SPEED 21 HIGHEST GUST DIRECTION N (20)
AVERAGE WIND SPEED 8.4
SKY COVER
AVERAGE SKY COVER 0.8
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 86 200 AM
LOWEST 43 300 PM
AVERAGE 65
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THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 69 89 1974
MINIMUM TEMPERATURE (F) 52 38 1948
SUNRISE AND SUNSET
SEPTEMBER 24 2026.....SUNRISE 659 AM PDT SUNSET 702 PM PDT
SEPTEMBER 25 2026.....SUNRISE 700 AM PDT SUNSET 700 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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