Climatological Report (Daily)
Issued by NWS
Issued by NWS
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740
CDUS46 KSEW 190116
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
616 PM PDT WED SEP 18 2024
...................................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 18 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 70 305 PM 85 1991 71 -1 67
MINIMUM 57 420 AM 38 1947 53 4 54
AVERAGE 64 62 2 61
PRECIPITATION (IN)
TODAY T 0.81 2021 0.05 -0.05 0.11
MONTH TO DATE 0.39 0.85 -0.46 0.29
SINCE OCT 1 35.49 38.58 -3.09 29.56
SINCE JAN 1 18.34 22.64 -4.30 14.67
SNOWFALL (IN)
TODAY MM 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 MM
DEGREE DAYS
HEATING
TODAY 1 4 -3 4
MONTH TO DATE 43 43 0 25
SINCE SEP 1 43 43 0 25
SINCE JUL 1 81 98 -17 37
COOLING
TODAY 0 1 -1 0
MONTH TO DATE 37 27 10 26
SINCE SEP 1 37 27 10 26
SINCE JAN 1 310 260 50 378
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 4 RESULTANT WIND DIRECTION N (340)
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION NW (300)
HIGHEST GUST SPEED 18 HIGHEST GUST DIRECTION W (290)
AVERAGE WIND SPEED 5.1
SKY COVER
AVERAGE SKY COVER 0.8
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 100 300 AM
LOWEST 55 300 PM
AVERAGE 78
..........................................................
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 71 82 1999
MINIMUM TEMPERATURE (F) 53 40 1947
1957
SUNRISE AND SUNSET
SEPTEMBER 18 2024.....SUNRISE 651 AM PDT SUNSET 714 PM PDT
SEPTEMBER 19 2024.....SUNRISE 653 AM PDT SUNSET 712 PM PDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$