505  
CDUS46 KSEW 130927  
CLISEA  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SEATTLE  
127 AM PST FRI DEC 13 2024  
   
...............................
 
 
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR DECEMBER 12 2024...  
 
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)  
YESTERDAY  
MAXIMUM 46 1229 PM 60 1960 47 -1 44  
1995  
MINIMUM 36 231 AM 22 1972 37 -1 34  
AVERAGE 41 42 -1 39  
 
PRECIPITATION (IN)  
YESTERDAY 0.03 2.19 2010 0.18 -0.15 0.00  
MONTH TO DATE 0.62 2.25 -1.63 6.56  
SINCE OCT 1 8.52 12.47 -3.95 15.23  
SINCE JAN 1 27.30 35.87 -8.57 33.05  
 
SNOWFALL (IN)  
YESTERDAY MM 2.6 1975 0.0  
MONTH TO DATE 0.0 0.0  
SINCE OCT 1 0.0 0.0  
SINCE JUL 1 0.0 0.0  
SNOW DEPTH MM  
 
DEGREE DAYS  
HEATING  
YESTERDAY 24 23 1 26  
MONTH TO DATE 292 269 23 231  
SINCE DEC 1 292 269 23 231  
SINCE JUL 1 1333 1330 3 1234  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE DEC 1 0 0 0 0  
SINCE JAN 1 315 263 52 378    
...............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 3 RESULTANT WIND DIRECTION SE (130)  
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION E (110)  
HIGHEST GUST SPEED 17 HIGHEST GUST DIRECTION SE (120)  
AVERAGE WIND SPEED 5.9  
 
SKY COVER  
AVERAGE SKY COVER 1.0  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 600 PM  
LOWEST 55 700 AM  
AVERAGE 78  
   
......................................................
 
 
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 47 59 1952  
MINIMUM TEMPERATURE (F) 37 19 1972  
 
SUNRISE AND SUNSET  
DECEMBER 13 2024......SUNRISE 749 AM PST SUNSET 418 PM PST  
DECEMBER 14 2024......SUNRISE 750 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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