701
CDUS46 KSEW 190118
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
618 PM PDT MON AUG 18 2025
...............................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR AUGUST 18 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 75 345 PM 88 1991 78 -3 78
MINIMUM 58 534 AM 47 1951 57 1 60
AVERAGE 67 67 0 69
PRECIPITATION (IN)
TODAY 0.00 1.63 1975 0.04 -0.04 T
MONTH TO DATE 1.14 0.48 0.66 0.47
SINCE OCT 1 28.91 37.24 -8.33 34.12
SINCE JAN 1 15.51 21.30 -5.79 16.97
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 0
MONTH TO DATE 2 11 -9 2
SINCE JUN 1 117 160 -43 141
SINCE JUL 1 23 42 -19 9
COOLING
TODAY 2 3 -1 4
MONTH TO DATE 61 67 -6 67
SINCE JUN 1 222 192 30 250
SINCE JAN 1 225 202 23 257
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WIND (MPH)
RESULTANT WIND SPEED 3 RESULTANT WIND DIRECTION SW (210)
HIGHEST WIND SPEED 12 HIGHEST WIND DIRECTION W (260)
HIGHEST GUST SPEED 20 HIGHEST GUST DIRECTION SW (230)
AVERAGE WIND SPEED 5.4
SKY COVER
AVERAGE SKY COVER 0.8
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 83 700 AM
LOWEST 37 1200 PM
AVERAGE 60
......................................................
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 77 95 2016
MINIMUM TEMPERATURE (F) 57 47 1945
1947
SUNRISE AND SUNSET
AUGUST 18 2025........SUNRISE 610 AM PDT SUNSET 815 PM PDT
AUGUST 19 2025........SUNRISE 611 AM PDT SUNSET 813 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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