077
CDUS46 KSEW 140830
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
130 AM PDT MON SEP 14 2026
...............................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 13 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 60 711 PM 87 1999 73 -13 75
MINIMUM 54 1004 AM 39 1952 54 0 57
AVERAGE 57 63 -6 66
PRECIPITATION (IN)
YESTERDAY 0.55R 0.51 1955 0.05 0.50 0.00
MONTH TO DATE 1.02 0.59 0.43 0.06
SINCE OCT 1 37.93 38.32 -0.39 28.97
SINCE JAN 1 21.15 22.38 -1.23 15.57
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 8 3 5 0
MONTH TO DATE 37 27 10 5
SINCE SEP 1 37 27 10 5
SINCE JUL 1 62 82 -20 29
COOLING
YESTERDAY 0 1 -1 1
MONTH TO DATE 1 22 -21 22
SINCE SEP 1 1 22 -21 22
SINCE JAN 1 266 255 11 316
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WIND (MPH)
RESULTANT WIND SPEED 9 RESULTANT WIND DIRECTION S (180)
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION S (180)
HIGHEST GUST SPEED 21 HIGHEST GUST DIRECTION SW (210)
AVERAGE WIND SPEED 10.1
SKY COVER
AVERAGE SKY COVER 0.9
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
RAIN
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 97 500 AM
LOWEST 81 800 PM
AVERAGE 89
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THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 72 93 1979
MINIMUM TEMPERATURE (F) 54 46 1947
1955
1986
SUNRISE AND SUNSET
SEPTEMBER 14 2026.....SUNRISE 646 AM PDT SUNSET 723 PM PDT
SEPTEMBER 15 2026.....SUNRISE 647 AM PDT SUNSET 721 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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