280
CDUS46 KSEW 100116
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
616 PM PDT WED SEP 09 2026
...............................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 9 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 78 442 PM 89 1963 74 4 70
MINIMUM 54 509 AM 40 1952 55 -1 58
AVERAGE 66 64 2 64
PRECIPITATION (IN)
TODAY 0.00 0.61 1982 0.04 -0.04 0.00
MONTH TO DATE 0.35 0.39 -0.04 0.05
SINCE OCT 1 37.26 38.12 -0.86 28.96
SINCE JAN 1 20.48 22.18 -1.70 15.56
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 0 2 -2 1
MONTH TO DATE 18 18 0 2
SINCE SEP 1 18 18 0 2
SINCE JUL 1 43 73 -30 26
COOLING
TODAY 1 2 -1 0
MONTH TO DATE 1 18 -17 21
SINCE SEP 1 1 18 -17 21
SINCE JAN 1 266 251 15 315
...............................................................
WIND (MPH)
RESULTANT WIND SPEED 4 RESULTANT WIND DIRECTION N (340)
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION N (10)
HIGHEST GUST SPEED 15 HIGHEST GUST DIRECTION N (20)
AVERAGE WIND SPEED 6.4
SKY COVER
AVERAGE SKY COVER 0.5
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 600 AM
LOWEST 43 400 PM
AVERAGE 68
......................................................
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 74 92 2022
MINIMUM TEMPERATURE (F) 55 39 1952
SUNRISE AND SUNSET
SEPTEMBER 9 2026.....SUNRISE 639 AM PDT SUNSET 733 PM PDT
SEPTEMBER 10 2026.....SUNRISE 640 AM PDT SUNSET 731 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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