863
CDUS46 KSEW 280845
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
145 AM PDT THU SEP 28 2023
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...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 27 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 60 505 PM 89 1967 68 -8 76
MINIMUM 52 1153 PM 35 1972 51 1 53
AVERAGE 56 60 -4 65
PRECIPITATION (IN)
YESTERDAY 0.43 1.04 1981 0.07 0.36 0.00
MONTH TO DATE 3.31 1.39 1.92 0.22
SINCE OCT 1 32.58 39.12 -6.54 45.45
SINCE JAN 1 17.69 23.18 -5.49 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 MM
DEGREE DAYS
HEATING
YESTERDAY 9 6 3 0
MONTH TO DATE 79 85 -6 25
SINCE SEP 1 79 85 -6 25
SINCE JUL 1 91 140 -49 45
COOLING
YESTERDAY 0 0 0 0
MONTH TO DATE 26 30 -4 37
SINCE SEP 1 26 30 -4 37
SINCE JAN 1 378 263 115 381
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WIND (MPH)
RESULTANT WIND SPEED 8 RESULTANT WIND DIRECTION S (180)
HIGHEST WIND SPEED 22 HIGHEST WIND DIRECTION SW (220)
HIGHEST GUST SPEED 30 HIGHEST GUST DIRECTION SW (220)
AVERAGE WIND SPEED 11.8
SKY COVER
AVERAGE SKY COVER 0.9
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
RAIN
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 1000 AM
LOWEST 72 100 AM
AVERAGE 83
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THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 68 86 2017
MINIMUM TEMPERATURE (F) 51 38 1946
1950
SUNRISE AND SUNSET
SEPTEMBER 28 2023.....SUNRISE 704 AM PDT SUNSET 655 PM PDT
SEPTEMBER 29 2023.....SUNRISE 705 AM PDT SUNSET 653 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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