Climatological Report (Daily)
Issued by NWS
Issued by NWS
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678
CDUS46 KSEW 190828
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
128 AM PDT SAT SEP 19 2026
...................................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 18 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 69 326 PM 85 1991 71 -2 72
MINIMUM 55 1159 PM 38 1947 53 2 53
AVERAGE 62 62 0 63
PRECIPITATION (IN)
YESTERDAY 0.00 0.81 2021 0.05 -0.05 0.00
MONTH TO DATE 1.03 0.85 0.18 0.06
SINCE OCT 1 37.94 38.58 -0.64 28.97
SINCE JAN 1 21.16 22.64 -1.48 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 3 4 -1 2
MONTH TO DATE 49 43 6 13
SINCE SEP 1 49 43 6 13
SINCE JUL 1 74 98 -24 37
COOLING
YESTERDAY 0 1 -1 0
MONTH TO DATE 2 27 -25 34
SINCE SEP 1 2 27 -25 34
SINCE JAN 1 267 260 7 328
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 6 RESULTANT WIND DIRECTION S (200)
HIGHEST WIND SPEED 12 HIGHEST WIND DIRECTION S (190)
HIGHEST GUST SPEED 16 HIGHEST GUST DIRECTION S (200)
AVERAGE WIND SPEED 6.7
SKY COVER
AVERAGE SKY COVER 0.5
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
HAZE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 97 400 AM
LOWEST 57 400 PM
AVERAGE 77
..........................................................
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 71 82 1999
MINIMUM TEMPERATURE (F) 53 40 1947
1957
SUNRISE AND SUNSET
SEPTEMBER 19 2026.....SUNRISE 652 AM PDT SUNSET 713 PM PDT
SEPTEMBER 20 2026.....SUNRISE 654 AM PDT SUNSET 711 PM PDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$