719
CDUS46 KSEW 180121
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
621 PM PDT SUN SEP 17 2023
...............................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 17 2023...
VALID TODAY AS OF 0500 PM LOCAL TIME.
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)
TODAY
MAXIMUM 70 449 PM 85 1991 72 -2 68
MINIMUM 55 539 AM 41 1947 54 1 51
AVERAGE 63 62 1 60
PRECIPITATION (IN)
TODAY 0.00 1.49 2010 0.06 -0.06 0.00
MONTH TO DATE 0.18 0.80 -0.62 0.22
SINCE OCT 1 29.45 38.53 -9.08 45.45
SINCE JAN 1 14.56 22.59 -8.03 25.35
SNOWFALL (IN)
TODAY 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
TODAY 2 3 -1 5
MONTH TO DATE 21 39 -18 14
SINCE SEP 1 21 39 -18 14
SINCE JUL 1 33 94 -61 34
COOLING
TODAY 0 1 -1 0
MONTH TO DATE 26 26 0 29
SINCE SEP 1 26 26 0 29
SINCE JAN 1 378 259 119 373
...............................................................
WIND (MPH)
RESULTANT WIND SPEED 4 RESULTANT WIND DIRECTION S (170)
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION S (200)
HIGHEST GUST SPEED 17 HIGHEST GUST DIRECTION SW (210)
AVERAGE WIND SPEED 5.5
SKY COVER
AVERAGE SKY COVER 0.8
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 75 700 AM
LOWEST 44 400 PM
AVERAGE 60
......................................................
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 71 85 1991
MINIMUM TEMPERATURE (F) 53 38 1947
SUNRISE AND SUNSET
SEPTEMBER 17 2023.....SUNRISE 649 AM PDT SUNSET 717 PM PDT
SEPTEMBER 18 2023.....SUNRISE 650 AM PDT SUNSET 715 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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