844
CDUS46 KSEW 190118
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
618 PM PDT FRI SEP 18 2026
...............................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 18 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 69 326 PM 85 1991 71 -2 72
MINIMUM 55 315 AM 38 1947 53 2 53
AVERAGE 62 62 0 63
PRECIPITATION (IN)
TODAY 0.00 0.81 2021 0.05 -0.05 0.00
MONTH TO DATE 1.03 0.85 0.18 0.06
SINCE OCT 1 37.94 38.58 -0.64 28.97
SINCE JAN 1 21.16 22.64 -1.48 15.57
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 3 4 -1 2
MONTH TO DATE 49 43 6 13
SINCE SEP 1 49 43 6 13
SINCE JUL 1 74 98 -24 37
COOLING
TODAY 0 1 -1 0
MONTH TO DATE 2 27 -25 34
SINCE SEP 1 2 27 -25 34
SINCE JAN 1 267 260 7 328
...............................................................
WIND (MPH)
RESULTANT WIND SPEED 7 RESULTANT WIND DIRECTION S (200)
HIGHEST WIND SPEED 12 HIGHEST WIND DIRECTION S (190)
HIGHEST GUST SPEED 16 HIGHEST GUST DIRECTION S (200)
AVERAGE WIND SPEED 7.0
SKY COVER
AVERAGE SKY COVER 0.6
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
HAZE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 97 400 AM
LOWEST 57 400 PM
AVERAGE 77
......................................................
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 71 82 1999
MINIMUM TEMPERATURE (F) 53 40 1947
1957
SUNRISE AND SUNSET
SEPTEMBER 18 2026.....SUNRISE 651 AM PDT SUNSET 715 PM PDT
SEPTEMBER 19 2026.....SUNRISE 652 AM PDT SUNSET 713 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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