Climatological Report (Daily)
Issued by NWS
Issued by NWS
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657
CDUS46 KSEW 210128
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
628 PM PDT WED AUG 20 2025
...................................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR AUGUST 20 2025...
VALID TODAY AS OF 0500 PM LOCAL TIME.
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)
TODAY
MAXIMUM 75 421 PM 91 2016 77 -2 68
MINIMUM 61 504 AM 45 1945 57 4 58
AVERAGE 68 67 1 63
PRECIPITATION (IN)
TODAY 0.00 0.70 2008 0.04 -0.04 0.17
MONTH TO DATE 1.14 0.55 0.59 0.64
SINCE OCT 1 28.91 37.31 -8.40 34.29
SINCE JAN 1 15.51 21.37 -5.86 17.14
SNOWFALL (IN)
TODAY 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
TODAY 0 1 -1 2
MONTH TO DATE 2 13 -11 4
SINCE JUN 1 117 162 -45 143
SINCE JUL 1 23 44 -21 11
COOLING
TODAY 3 3 0 0
MONTH TO DATE 66 73 -7 69
SINCE JUN 1 227 198 29 252
SINCE JAN 1 230 208 22 259
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 7 RESULTANT WIND DIRECTION N (10)
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION NE (30)
HIGHEST GUST SPEED 20 HIGHEST GUST DIRECTION NE (30)
AVERAGE WIND SPEED 10.2
SKY COVER
AVERAGE SKY COVER 0.6
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 78 100 AM
LOWEST 38 400 PM
AVERAGE 58
..........................................................
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 77 91 2018
MINIMUM TEMPERATURE (F) 57 44 1947
SUNRISE AND SUNSET
AUGUST 20 2025........SUNRISE 613 AM PDT SUNSET 811 PM PDT
AUGUST 21 2025........SUNRISE 614 AM PDT SUNSET 810 PM PDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$