515
CDUS46 KSEW 180927
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
127 AM PST MON DEC 18 2023
...............................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR DECEMBER 17 2023...
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)
YESTERDAY
MAXIMUM 49 306 PM 57 1994 47 2 40
MINIMUM 33 421 AM 11 1964 37 -4 30
AVERAGE 41 42 -1 35
PRECIPITATION (IN)
YESTERDAY 0.00 1.61 1979 0.17 -0.17 0.14
MONTH TO DATE 6.70 3.14 3.56 2.37
SINCE OCT 1 15.37 13.36 2.01 9.71
SINCE JAN 1 33.19 36.76 -3.57 35.09
SNOWFALL (IN)
YESTERDAY 0.0 0.1 1992 0.0
MONTH TO DATE 0.0 3.4
SINCE OCT 1 0.0 4.5
SINCE JUL 1 0.0 4.5
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 24 23 1 30
MONTH TO DATE 336 384 -48 457
SINCE DEC 1 336 384 -48 457
SINCE JUL 1 1339 1445 -106 1407
COOLING
YESTERDAY 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
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WIND (MPH)
RESULTANT WIND SPEED 6 RESULTANT WIND DIRECTION N (20)
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION NE (30)
HIGHEST GUST SPEED 19 HIGHEST GUST DIRECTION NE (30)
AVERAGE WIND SPEED 6.1
SKY COVER
AVERAGE SKY COVER 0.8
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
FOG
FOG W/VISIBILITY <= 1/4 MILE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 100 200 AM
LOWEST 61 300 PM
AVERAGE 81
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THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 47 54 2003
2004
2018
MINIMUM TEMPERATURE (F) 37 18 1964
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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