244
CDUS46 KSEW 170826
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
126 AM PDT SUN SEP 17 2023
...............................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 16 2023...
CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1945 TO 2023
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...............................................................
TEMPERATURE (F)
YESTERDAY
MAXIMUM 78 314 PM 91 1967 72 6 69
MINIMUM 55 542 AM 44 1952 54 1 54
1992
AVERAGE 67 63 4 62
PRECIPITATION (IN)
YESTERDAY 0.00 1.10 1947 0.05 -0.05 0.15
MONTH TO DATE 0.18 0.74 -0.56 0.22
SINCE OCT 1 29.45 38.47 -9.02 45.45
SINCE JAN 1 14.56 22.53 -7.97 25.35
SNOWFALL (IN)
YESTERDAY 0.0 MM MM 0.0
MONTH TO DATE 0.0 0.0
SINCE OCT 1 8.1 9.2
SINCE JUL 1 0.0 0.0
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 0 3 -3 3
MONTH TO DATE 19 36 -17 9
SINCE SEP 1 19 36 -17 9
SINCE JUL 1 31 91 -60 29
COOLING
YESTERDAY 2 1 1 0
MONTH TO DATE 26 25 1 29
SINCE SEP 1 26 25 1 29
SINCE JAN 1 378 258 120 373
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WIND (MPH)
RESULTANT WIND SPEED 2 RESULTANT WIND DIRECTION W (250)
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION SW (220)
HIGHEST GUST SPEED 17 HIGHEST GUST DIRECTION SW (220)
AVERAGE WIND SPEED 4.4
SKY COVER
AVERAGE SKY COVER 0.3
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 77 700 AM
LOWEST 37 300 PM
AVERAGE 57
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THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 72 85 1991
MINIMUM TEMPERATURE (F) 54 41 1947
SUNRISE AND SUNSET
SEPTEMBER 17 2023.....SUNRISE 649 AM PDT SUNSET 717 PM PDT
SEPTEMBER 18 2023.....SUNRISE 650 AM PDT SUNSET 715 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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