080
CDUS46 KSEW 190220
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
620 PM PST MON DEC 18 2023
...............................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR DECEMBER 18 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 49 234 PM 54 2003 47 2 42
2004
2018
MINIMUM 38 209 AM 18 1964 37 1 31
AVERAGE 44 42 2 37
PRECIPITATION (IN)
TODAY 0.04 1.23 1960 0.18 -0.14 0.02
MONTH TO DATE 6.74 3.32 3.42 2.39
SINCE OCT 1 15.41 13.54 1.87 9.73
SINCE JAN 1 33.23 36.94 -3.71 35.11
SNOWFALL (IN)
TODAY 0.0 5.1 1968 0.2
MONTH TO DATE 0.0 3.6
SINCE OCT 1 0.0 4.7
SINCE JUL 1 0.0 4.7
SNOW DEPTH 0
DEGREE DAYS
HEATING
TODAY 21 23 -2 28
MONTH TO DATE 357 407 -50 485
SINCE DEC 1 357 407 -50 485
SINCE JUL 1 1360 1468 -108 1435
COOLING
TODAY 0 0 0 0
MONTH TO DATE 0 0 0 0
SINCE DEC 1 0 0 0 0
SINCE JAN 1 378 263 115 394
...............................................................
WIND (MPH)
RESULTANT WIND SPEED 1 RESULTANT WIND DIRECTION S (180)
HIGHEST WIND SPEED 10 HIGHEST WIND DIRECTION E (100)
HIGHEST GUST SPEED 15 HIGHEST GUST DIRECTION SE (120)
AVERAGE WIND SPEED 2.6
SKY COVER
AVERAGE SKY COVER 1.0
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
LIGHT RAIN
FOG
FOG W/VISIBILITY <= 1/4 MILE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 100 600 AM
LOWEST 77 300 PM
AVERAGE 89
......................................................
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 46 56 1969
1994
MINIMUM TEMPERATURE (F) 37 17 1949
1990
SUNRISE AND SUNSET
DECEMBER 18 2023......SUNRISE 752 AM PST SUNSET 419 PM PST
DECEMBER 19 2023......SUNRISE 753 AM PST SUNSET 420 PM PST
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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