513
CDUS46 KSEW 170827
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
127 AM PDT TUE SEP 17 2024
...............................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 16 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 68 509 PM 91 1967 72 -4 78
MINIMUM 50 536 AM 44 1952 54 -4 55
1992
AVERAGE 59 63 -4 67
PRECIPITATION (IN)
YESTERDAY 0.00 1.10 1947 0.05 -0.05 0.00
MONTH TO DATE 0.39 0.74 -0.35 0.18
SINCE OCT 1 35.49 38.47 -2.98 29.45
SINCE JAN 1 18.34 22.53 -4.19 14.56
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 3 3 0
MONTH TO DATE 35 36 -1 19
SINCE SEP 1 35 36 -1 19
SINCE JUL 1 73 91 -18 31
COOLING
YESTERDAY 0 1 -1 2
MONTH TO DATE 37 25 12 26
SINCE SEP 1 37 25 12 26
SINCE JAN 1 310 258 52 378
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WIND (MPH)
RESULTANT WIND SPEED 3 RESULTANT WIND DIRECTION NE (30)
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION N (20)
HIGHEST GUST SPEED 21 HIGHEST GUST DIRECTION NE (30)
AVERAGE WIND SPEED 6.1
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 50 500 PM
AVERAGE 72
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THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 72 85 1991
MINIMUM TEMPERATURE (F) 54 41 1947
SUNRISE AND SUNSET
SEPTEMBER 17 2024.....SUNRISE 650 AM PDT SUNSET 716 PM PDT
SEPTEMBER 18 2024.....SUNRISE 651 AM PDT SUNSET 714 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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