704
CDUS46 KSEW 130827
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
127 AM PDT SUN SEP 13 2026
...............................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 12 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 66 416 PM 85 1961 73 -7 72
1975
MINIMUM 53 614 AM 44 1949 54 -1 58
1962
AVERAGE 60 64 -4 65
PRECIPITATION (IN)
YESTERDAY 0.12 0.60 2004 0.05 0.07 0.00
MONTH TO DATE 0.47 0.54 -0.07 0.06
SINCE OCT 1 37.38 38.27 -0.89 28.97
SINCE JAN 1 20.60 22.33 -1.73 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 5 2 3 0
MONTH TO DATE 29 24 5 5
SINCE SEP 1 29 24 5 5
SINCE JUL 1 54 79 -25 29
COOLING
YESTERDAY 0 1 -1 0
MONTH TO DATE 1 21 -20 21
SINCE SEP 1 1 21 -20 21
SINCE JAN 1 266 254 12 315
...............................................................
WIND (MPH)
RESULTANT WIND SPEED 3 RESULTANT WIND DIRECTION W (270)
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION SW (210)
HIGHEST GUST SPEED 19 HIGHEST GUST DIRECTION SW (220)
AVERAGE WIND SPEED 4.6
SKY COVER
AVERAGE SKY COVER 0.9
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
RAIN
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 97 1000 PM
LOWEST 54 400 PM
AVERAGE 76
......................................................
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 73 87 1999
MINIMUM TEMPERATURE (F) 54 39 1952
SUNRISE AND SUNSET
SEPTEMBER 13 2026.....SUNRISE 644 AM PDT SUNSET 725 PM PDT
SEPTEMBER 14 2026.....SUNRISE 646 AM PDT SUNSET 723 PM PDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page