482  
CDUS46 KSEW 100941  
CLISEA  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SEATTLE  
141 AM PST SUN DEC 10 2023  
   
...............................
 
 
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR DECEMBER 9 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 44 1159 PM 61 2014 47 -3 43  
MINIMUM 35 343 AM 18 2009 37 -2 36  
AVERAGE 40 42 -2 40  
 
PRECIPITATION (IN)  
YESTERDAY 0.64 1.78 1956 0.18 0.46 0.71  
MONTH TO DATE 6.42 1.70 4.72 1.71  
SINCE OCT 1 15.09 11.92 3.17 9.05  
SINCE JAN 1 32.91 35.32 -2.41 34.43  
 
SNOWFALL (IN)  
YESTERDAY 0.0 T 1978 0.0  
2016  
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 25 23 2 25  
MONTH TO DATE 169 200 -31 247  
SINCE DEC 1 169 200 -31 247  
SINCE JUL 1 1172 1261 -89 1197  
 
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 3 RESULTANT WIND DIRECTION SE (130)  
HIGHEST WIND SPEED 9 HIGHEST WIND DIRECTION S (190)  
HIGHEST GUST SPEED 14 HIGHEST GUST DIRECTION SW (210)  
AVERAGE WIND SPEED 4.6  
 
SKY COVER  
AVERAGE SKY COVER 1.0  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 96 400 PM  
LOWEST 70 600 AM  
AVERAGE 83  
   
......................................................
 
 
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 47 66 2014  
MINIMUM TEMPERATURE (F) 37 16 2009  
 
SUNRISE AND SUNSET  
DECEMBER 10 2023......SUNRISE 746 AM PST SUNSET 418 PM PST  
DECEMBER 11 2023......SUNRISE 747 AM PST SUNSET 418 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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