647
CDUS46 KSEW 130831
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
131 AM PDT WED SEP 13 2023
...............................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 12 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 69 1250 PM 85 1961 73 -4 72
1975
MINIMUM 55 603 AM 44 1949 54 1 60
1962
AVERAGE 62 64 -2 66
PRECIPITATION (IN)
YESTERDAY 0.05 0.60 2004 0.05 0.00 0.00
MONTH TO DATE 0.18 0.54 -0.36 0.07
SINCE OCT 1 29.45 38.27 -8.82 45.30
SINCE JAN 1 14.56 22.33 -7.77 25.20
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 3 2 1 0
MONTH TO DATE 18 24 -6 2
SINCE SEP 1 18 24 -6 2
SINCE JUL 1 30 79 -49 22
COOLING
YESTERDAY 0 1 -1 1
MONTH TO DATE 19 21 -2 29
SINCE SEP 1 19 21 -2 29
SINCE JAN 1 371 254 117 373
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WIND (MPH)
RESULTANT WIND SPEED 4 RESULTANT WIND DIRECTION S (180)
HIGHEST WIND SPEED 12 HIGHEST WIND DIRECTION SW (220)
HIGHEST GUST SPEED 18 HIGHEST GUST DIRECTION SW (220)
AVERAGE WIND SPEED 5.9
SKY COVER
AVERAGE SKY COVER 0.9
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
LIGHT RAIN
HAZE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 87 300 PM
LOWEST 49 1200 PM
AVERAGE 68
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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 2023.....SUNRISE 644 AM PDT SUNSET 725 PM PDT
SEPTEMBER 14 2023.....SUNRISE 645 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.
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