098
CDUS46 KSEW 010831
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
131 AM PDT THU OCT 01 2026
...............................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 30 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 65 323 PM 82 1992 67 -2 70
MINIMUM 49 427 AM 36 1950 51 -2 52
AVERAGE 57 59 -2 61
PRECIPITATION (IN)
YESTERDAY 0.00 1.65 1953 0.08 -0.08 0.06
MONTH TO DATE 1.46 1.61 -0.15 0.76
SINCE OCT 1 38.37 39.34 -0.97 29.67
SINCE JAN 1 21.59 23.40 -1.81 16.27
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 4
MONTH TO DATE 133 103 30 51
SINCE SEP 1 133 103 30 51
SINCE JUL 1 158 158 0 75
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
...............................................................
WIND (MPH)
RESULTANT WIND SPEED 7 RESULTANT WIND DIRECTION N (20)
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION NE (40)
HIGHEST GUST SPEED 20 HIGHEST GUST DIRECTION NE (30)
AVERAGE WIND SPEED 7.5
SKY COVER
AVERAGE SKY COVER 0.6
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 86 500 AM
LOWEST 54 300 PM
AVERAGE 70
......................................................
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 66 89 1987
MINIMUM TEMPERATURE (F) 51 35 1950
SUNRISE AND SUNSET
OCTOBER 1 2026.......SUNRISE 708 AM PDT SUNSET 648 PM PDT
OCTOBER 2 2026.......SUNRISE 710 AM PDT SUNSET 646 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