714  
CDUS46 KSEW 150926  
CLISEA  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SEATTLE  
126 AM PST FRI DEC 15 2023  
   
...............................  
 
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR DECEMBER 14 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 48 1007 PM 59 2002 47 1 43  
MINIMUM 43 1021 AM 18 1945 37 6 35  
AVERAGE 46 42 4 39  
 
PRECIPITATION (IN)  
YESTERDAY 0.14 1.67 1979 0.18 -0.04 T  
MONTH TO DATE 6.70 2.61 4.09 2.23  
SINCE OCT 1 15.37 12.83 2.54 9.57  
SINCE JAN 1 33.19 36.23 -3.04 34.95  
 
SNOWFALL (IN)  
YESTERDAY 0.0 0.7 2008 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 19 23 -4 26  
MONTH TO DATE 272 315 -43 369  
SINCE DEC 1 272 315 -43 369  
SINCE JUL 1 1275 1376 -101 1319  
 
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    
...............................................................  
 
WIND (MPH)  
RESULTANT WIND SPEED 4 RESULTANT WIND DIRECTION E (90)  
HIGHEST WIND SPEED 12 HIGHEST WIND DIRECTION NE (30)  
HIGHEST GUST SPEED 16 HIGHEST GUST DIRECTION E (100)  
AVERAGE WIND SPEED 6.0  
 
SKY COVER  
AVERAGE SKY COVER 1.0  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 86 400 PM  
LOWEST 53 100 AM  
AVERAGE 70  
   
......................................................  
 
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 47 63 1980  
MINIMUM TEMPERATURE (F) 37 19 2008  
 
SUNRISE AND SUNSET  
DECEMBER 15 2023......SUNRISE 750 AM PST SUNSET 419 PM PST  
DECEMBER 16 2023......SUNRISE 751 AM PST SUNSET 419 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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