200
CDUS46 KSEW 220831
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
131 AM PDT SUN SEP 22 2024
...............................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 21 2024...
CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1945 TO 2024
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...............................................................
TEMPERATURE (F)
YESTERDAY
MAXIMUM 70 357 PM 88 1952 70 0 70
1974
MINIMUM 47 544 AM 39 1955 53 -6 48
1960
AVERAGE 59 61 -2 59
PRECIPITATION (IN)
YESTERDAY 0.00 0.94 1981 0.06 -0.06 0.00
MONTH TO DATE 0.41 1.02 -0.61 0.70
SINCE OCT 1 35.51 38.75 -3.24 29.97
SINCE JAN 1 18.36 22.81 -4.45 15.08
SNOWFALL (IN)
YESTERDAY 0.0 MM MM 0.0
MONTH TO DATE 0.0 0.0
SINCE OCT 1 0.3 8.1
SINCE JUL 1 0.0 0.0
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 6 4 2 6
MONTH TO DATE 61 55 6 43
SINCE SEP 1 61 55 6 43
SINCE JUL 1 99 110 -11 55
COOLING
YESTERDAY 0 1 -1 0
MONTH TO DATE 37 30 7 26
SINCE SEP 1 37 30 7 26
SINCE JAN 1 310 263 47 378
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WIND (MPH)
RESULTANT WIND SPEED 2 RESULTANT WIND DIRECTION NW (330)
HIGHEST WIND SPEED 12 HIGHEST WIND DIRECTION NW (310)
HIGHEST GUST SPEED 14 HIGHEST GUST DIRECTION NW (310)
AVERAGE WIND SPEED 4.2
SKY COVER
AVERAGE SKY COVER 0.5
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 500 AM
LOWEST 40 700 PM
AVERAGE 67
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THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 70 92 1990
MINIMUM TEMPERATURE (F) 53 37 1955
SUNRISE AND SUNSET
SEPTEMBER 22 2024.....SUNRISE 657 AM PDT SUNSET 705 PM PDT
SEPTEMBER 23 2024.....SUNRISE 658 AM PDT SUNSET 703 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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