538
CDUS46 KSEW 290830
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
130 AM PDT MON SEP 29 2025
...............................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 28 2025...
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)
YESTERDAY
MAXIMUM 69 437 PM 86 2017 68 1 62
MINIMUM 52 550 AM 38 1946 51 1 49
1950
AVERAGE 61 59 2 56
PRECIPITATION (IN)
YESTERDAY 0.00 1.71 2013 0.07 -0.07 T
MONTH TO DATE 0.49 1.46 -0.97 0.62
SINCE OCT 1 29.40 39.19 -9.79 35.93
SINCE JAN 1 16.00 23.25 -7.25 18.78
SNOWFALL (IN)
YESTERDAY 0.0 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 0
DEGREE DAYS
HEATING
YESTERDAY 4 6 -2 9
MONTH TO DATE 42 91 -49 90
SINCE SEP 1 42 91 -49 90
SINCE JUL 1 66 146 -80 128
COOLING
YESTERDAY 0 0 0 0
MONTH TO DATE 34 30 4 42
SINCE SEP 1 34 30 4 42
SINCE JAN 1 328 263 65 315
...............................................................
WIND (MPH)
RESULTANT WIND SPEED 3 RESULTANT WIND DIRECTION S (200)
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION S (160)
HIGHEST GUST SPEED 22 HIGHEST GUST DIRECTION SE (150)
AVERAGE WIND SPEED 5.7
SKY COVER
AVERAGE SKY COVER 0.7
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 97 300 AM
LOWEST 57 300 PM
AVERAGE 77
......................................................
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 67 81 1992
1993
MINIMUM TEMPERATURE (F) 51 37 1954
SUNRISE AND SUNSET
SEPTEMBER 29 2025.....SUNRISE 706 AM PDT SUNSET 652 PM PDT
SEPTEMBER 30 2025.....SUNRISE 707 AM PDT SUNSET 650 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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