393
CDUS46 KSEW 210835
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
135 AM PDT THU SEP 21 2023
...............................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 20 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 64 438 PM 88 1974 71 -7 78
MINIMUM 51 1153 PM 40 1949 53 -2 55
AVERAGE 58 62 -4 67
PRECIPITATION (IN)
YESTERDAY 0.41 1.05 1972 0.05 0.36 0.00
MONTH TO DATE 0.70 0.96 -0.26 0.22
SINCE OCT 1 29.97 38.69 -8.72 45.45
SINCE JAN 1 15.08 22.75 -7.67 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 7 4 3 0
MONTH TO DATE 37 51 -14 16
SINCE SEP 1 37 51 -14 16
SINCE JUL 1 49 106 -57 36
COOLING
YESTERDAY 0 1 -1 2
MONTH TO DATE 26 29 -3 31
SINCE SEP 1 26 29 -3 31
SINCE JAN 1 378 262 116 375
...............................................................
WIND (MPH)
RESULTANT WIND SPEED 4 RESULTANT WIND DIRECTION N (10)
HIGHEST WIND SPEED 21 HIGHEST WIND DIRECTION N (360)
HIGHEST GUST SPEED 26 HIGHEST GUST DIRECTION N (360)
AVERAGE WIND SPEED 7.1
SKY COVER
AVERAGE SKY COVER 0.7
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
RAIN
LIGHT RAIN
FOG
HAZE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 400 AM
LOWEST 54 400 PM
AVERAGE 74
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THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 70 88 1952
1974
MINIMUM TEMPERATURE (F) 53 39 1955
1960
SUNRISE AND SUNSET
SEPTEMBER 21 2023.....SUNRISE 654 AM PDT SUNSET 709 PM PDT
SEPTEMBER 22 2023.....SUNRISE 656 AM PDT SUNSET 707 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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