817
CDUS46 KSEW 300835
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
135 AM PDT WED SEP 30 2026
...............................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 29 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 63 227 PM 81 1992 67 -4 63
1993
MINIMUM 53 647 PM 37 1954 51 2 56
AVERAGE 58 59 -1 60
PRECIPITATION (IN)
YESTERDAY 0.01 0.92 1951 0.07 -0.06 0.21
MONTH TO DATE 1.46 1.53 -0.07 0.70
SINCE OCT 1 38.37 39.26 -0.89 29.61
SINCE JAN 1 21.59 23.32 -1.73 16.21
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 6 1 5
MONTH TO DATE 125 97 28 47
SINCE SEP 1 125 97 28 47
SINCE JUL 1 150 152 -2 71
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
...............................................................
WIND (MPH)
RESULTANT WIND SPEED 8 RESULTANT WIND DIRECTION S (200)
HIGHEST WIND SPEED 20 HIGHEST WIND DIRECTION S (200)
HIGHEST GUST SPEED 29 HIGHEST GUST DIRECTION S (190)
AVERAGE WIND SPEED 12.8
SKY COVER
AVERAGE SKY COVER 1.0
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 900 AM
LOWEST 67 200 AM
AVERAGE 80
......................................................
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 67 82 1992
MINIMUM TEMPERATURE (F) 51 36 1950
SUNRISE AND SUNSET
SEPTEMBER 30 2026.....SUNRISE 707 AM PDT SUNSET 650 PM PDT
OCTOBER 1 2026.......SUNRISE 708 AM PDT SUNSET 648 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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