839
CDUS46 KSEW 280118
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
618 PM PDT SAT SEP 27 2025
...............................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 27 2025...
VALID TODAY AS OF 0500 PM LOCAL TIME.
CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1945 TO 2025
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...............................................................
TEMPERATURE (F)
TODAY
MAXIMUM 75 335 PM 89 1967 68 7 66
MINIMUM 56 648 AM 35 1972 51 5 52
AVERAGE 66 60 6 59
PRECIPITATION (IN)
TODAY 0.00 1.04 1981 0.07 -0.07 0.03
MONTH TO DATE 0.49 1.39 -0.90 0.62
SINCE OCT 1 29.40 39.12 -9.72 35.93
SINCE JAN 1 16.00 23.18 -7.18 18.78
SNOWFALL (IN)
TODAY MM MM MM 0.0
MONTH TO DATE 0.0 0.0
SINCE OCT 1 2.3 0.3
SINCE JUL 1 0.0 0.0
SNOW DEPTH MM
DEGREE DAYS
HEATING
TODAY 0 6 -6 6
MONTH TO DATE 38 85 -47 81
SINCE SEP 1 38 85 -47 81
SINCE JUL 1 62 140 -78 119
COOLING
TODAY 1 0 1 0
MONTH TO DATE 35 30 5 42
SINCE SEP 1 35 30 5 42
SINCE JAN 1 329 263 66 315
...............................................................
WIND (MPH)
RESULTANT WIND SPEED 1 RESULTANT WIND DIRECTION SE (150)
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION E (110)
HIGHEST GUST SPEED 17 HIGHEST GUST DIRECTION SE (120)
AVERAGE WIND SPEED 4.2
SKY COVER
AVERAGE SKY COVER 0.8
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 72 600 AM
LOWEST 42 100 PM
AVERAGE 57
......................................................
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 68 86 2017
MINIMUM TEMPERATURE (F) 51 38 1946
1950
SUNRISE AND SUNSET
SEPTEMBER 27 2025.....SUNRISE 703 AM PDT SUNSET 656 PM PDT
SEPTEMBER 28 2025.....SUNRISE 705 AM PDT SUNSET 654 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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