070
CDUS46 KSEW 280828
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
128 AM PDT MON SEP 28 2026
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...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 27 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 65 325 PM 89 1967 68 -3 75
MINIMUM 48 1154 PM 35 1972 51 -3 55
AVERAGE 57 60 -3 65
PRECIPITATION (IN)
YESTERDAY 0.00 1.04 1981 0.07 -0.07 0.00
MONTH TO DATE 1.45 1.39 0.06 0.49
SINCE OCT 1 38.36 39.12 -0.76 29.40
SINCE JAN 1 21.58 23.18 -1.60 16.00
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 6 2 0
MONTH TO DATE 108 85 23 38
SINCE SEP 1 108 85 23 38
SINCE JUL 1 133 140 -7 62
COOLING
YESTERDAY 0 0 0 0
MONTH TO DATE 2 30 -28 34
SINCE SEP 1 2 30 -28 34
SINCE JAN 1 267 263 4 328
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WIND (MPH)
RESULTANT WIND SPEED 10 RESULTANT WIND DIRECTION N (10)
HIGHEST WIND SPEED 20 HIGHEST WIND DIRECTION N (10)
HIGHEST GUST SPEED 26 HIGHEST GUST DIRECTION N (20)
AVERAGE WIND SPEED 10.4
SKY COVER
AVERAGE SKY COVER 0.5
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 90 400 AM
LOWEST 52 300 PM
AVERAGE 71
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THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 68 86 2017
MINIMUM TEMPERATURE (F) 51 38 1946
1950
SUNRISE AND SUNSET
SEPTEMBER 28 2026.....SUNRISE 704 AM PDT SUNSET 654 PM PDT
SEPTEMBER 29 2026.....SUNRISE 706 AM PDT SUNSET 652 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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