435
CDUS46 KSEW 220120
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
620 PM PDT SAT SEP 21 2024
...............................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 21 2024...
VALID TODAY AS OF 0500 PM LOCAL TIME.
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)
TODAY
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)
TODAY 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)
TODAY 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
TODAY 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
TODAY 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
...............................................................
WIND (MPH)
RESULTANT WIND SPEED 2 RESULTANT WIND DIRECTION W (290)
HIGHEST WIND SPEED 12 HIGHEST WIND DIRECTION NW (310)
HIGHEST GUST SPEED 14 HIGHEST GUST DIRECTION NW (310)
AVERAGE WIND SPEED 3.5
SKY COVER
AVERAGE SKY COVER 0.5
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 500 AM
LOWEST 40 400 PM
AVERAGE 67
......................................................
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 70 92 1990
MINIMUM TEMPERATURE (F) 53 37 1955
SUNRISE AND SUNSET
SEPTEMBER 21 2024.....SUNRISE 656 AM PDT SUNSET 708 PM PDT
SEPTEMBER 22 2024.....SUNRISE 657 AM PDT SUNSET 705 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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