732
CDUS46 KSEW 290831
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
131 AM PDT TUE SEP 29 2026
...............................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 28 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 64 225 PM 86 2017 68 -4 69
MINIMUM 46 453 AM 38 1946 51 -5 52
1950
AVERAGE 55 59 -4 61
PRECIPITATION (IN)
YESTERDAY T 1.71 2013 0.07 -0.07 0.00
MONTH TO DATE 1.45 1.46 -0.01 0.49
SINCE OCT 1 38.36 39.19 -0.83 29.40
SINCE JAN 1 21.58 23.25 -1.67 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 10 6 4 4
MONTH TO DATE 118 91 27 42
SINCE SEP 1 118 91 27 42
SINCE JUL 1 143 146 -3 66
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 6 RESULTANT WIND DIRECTION S (200)
HIGHEST WIND SPEED 20 HIGHEST WIND DIRECTION S (200)
HIGHEST GUST SPEED 26 HIGHEST GUST DIRECTION S (200)
AVERAGE WIND SPEED 8.0
SKY COVER
AVERAGE SKY COVER 0.7
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
LIGHT RAIN
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 200 AM
LOWEST 52 200 PM
AVERAGE 73
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THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 67 81 1992
1993
MINIMUM TEMPERATURE (F) 51 37 1954
SUNRISE AND SUNSET
SEPTEMBER 29 2026.....SUNRISE 706 AM PDT SUNSET 652 PM PDT
SEPTEMBER 30 2026.....SUNRISE 707 AM PDT SUNSET 650 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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