430
CDUS46 KSEW 120828
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
128 AM PDT TUE SEP 12 2023
...............................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 11 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 73 234 PM 93 2013 73 0 72
MINIMUM 58 1154 PM 40 1952 55 3 60
AVERAGE 66 64 2 66
PRECIPITATION (IN)
YESTERDAY 0.00 0.58 1956 0.05 -0.05 T
MONTH TO DATE 0.13 0.49 -0.36 0.07
SINCE OCT 1 29.40 38.22 -8.82 45.30
SINCE JAN 1 14.51 22.28 -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 0 2 -2 0
MONTH TO DATE 15 22 -7 2
SINCE SEP 1 15 22 -7 2
SINCE JUL 1 27 77 -50 22
COOLING
YESTERDAY 1 1 0 1
MONTH TO DATE 19 20 -1 28
SINCE SEP 1 19 20 -1 28
SINCE JAN 1 371 253 118 372
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WIND (MPH)
RESULTANT WIND SPEED 3 RESULTANT WIND DIRECTION S (200)
HIGHEST WIND SPEED 12 HIGHEST WIND DIRECTION SW (210)
HIGHEST GUST SPEED 16 HIGHEST GUST DIRECTION S (180)
AVERAGE WIND SPEED 4.6
SKY COVER
AVERAGE SKY COVER 0.7
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 83 1100 PM
LOWEST 55 200 PM
AVERAGE 69
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THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 73 85 1961
1975
MINIMUM TEMPERATURE (F) 54 44 1949
1962
SUNRISE AND SUNSET
SEPTEMBER 12 2023.....SUNRISE 642 AM PDT SUNSET 727 PM PDT
SEPTEMBER 13 2023.....SUNRISE 644 AM PDT SUNSET 725 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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