818
CDUS46 KSEW 230118
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
618 PM PDT TUE SEP 22 2026
...............................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 22 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 68 344 PM 92 1990 70 -2 71
MINIMUM 57 1213 AM 37 1955 53 4 52
AVERAGE 63 61 2 62
PRECIPITATION (IN)
TODAY 0.00 1.65 1978 0.05 -0.05 0.00
MONTH TO DATE 1.03 1.07 -0.04 0.49
SINCE OCT 1 37.94 38.80 -0.86 29.40
SINCE JAN 1 21.16 22.86 -1.70 16.00
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 2 4 -2 3
MONTH TO DATE 68 59 9 21
SINCE SEP 1 68 59 9 21
SINCE JUL 1 93 114 -21 45
COOLING
TODAY 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 1 RESULTANT WIND DIRECTION SW (240)
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION SW (230)
HIGHEST GUST SPEED 17 HIGHEST GUST DIRECTION SW (210)
AVERAGE WIND SPEED 5.8
SKY COVER
AVERAGE SKY COVER 0.7
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 87 100 AM
LOWEST 57 100 PM
AVERAGE 72
......................................................
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 69 84 1947
MINIMUM TEMPERATURE (F) 52 40 1948
SUNRISE AND SUNSET
SEPTEMBER 22 2026.....SUNRISE 656 AM PDT SUNSET 706 PM PDT
SEPTEMBER 23 2026.....SUNRISE 658 AM PDT SUNSET 704 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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