907  
CDUS46 KSEW 220216  
CLISEA  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SEATTLE  
616 PM PST SAT DEC 21 2024  
   
...............................
 
 
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR DECEMBER 21 2024...  
VALID TODAY AS OF 0500 PM LOCAL TIME.  
 
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)  
TODAY  
MAXIMUM 58 538 AM 59 2020 46 12 50  
MINIMUM 44 244 AM 12 1990 37 7 42  
AVERAGE 51 42 9 46  
 
PRECIPITATION (IN)  
TODAY 0.19 1.64 2020 0.19 0.00 0.00  
MONTH TO DATE 3.10 3.87 -0.77 6.87  
SINCE OCT 1 11.00 14.09 -3.09 15.54  
SINCE JAN 1 29.78 37.49 -7.71 33.36  
 
SNOWFALL (IN)  
TODAY 0.0 3.0 2008 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 0  
 
DEGREE DAYS  
HEATING  
TODAY 14 24 -10 19  
MONTH TO DATE 448 477 -29 411  
SINCE DEC 1 448 477 -29 411  
SINCE JUL 1 1489 1538 -49 1414  
 
COOLING  
TODAY 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 S (170)  
HIGHEST WIND SPEED 22 HIGHEST WIND DIRECTION SW (230)  
HIGHEST GUST SPEED 28 HIGHEST GUST DIRECTION S (200)  
AVERAGE WIND SPEED 9.6  
 
SKY COVER  
AVERAGE SKY COVER 0.9  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 93 100 PM  
LOWEST 44 500 AM  
AVERAGE 69  
   
......................................................
 
 
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 46 57 2005  
MINIMUM TEMPERATURE (F) 37 14 1983  
 
SUNRISE AND SUNSET  
DECEMBER 21 2024......SUNRISE 754 AM PST SUNSET 421 PM PST  
DECEMBER 22 2024......SUNRISE 755 AM PST SUNSET 422 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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