231  
CDUS46 KSEW 130827  
CLISEA  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SEATTLE  
127 AM PDT TUE APR 13 2021  
   
...............................
 
 
   
..THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR APRIL 12 2021
 
 
CLIMATE NORMAL PERIOD 1981 TO 2010  
CLIMATE RECORD PERIOD 1945 TO 2021  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 59 328 PM 79 2008 58 1 60  
MINIMUM 36 649 AM 33 1968 42 -6 37  
AVERAGE 48 50 -2 49  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 0.85 2017 0.09 -0.09 0.00  
MONTH TO DATE 0.27 1.22 -0.95 0.01  
SINCE OCT 1 31.12 29.41 1.71 29.80  
SINCE JAN 1 16.31 14.01 2.30 16.46  
 
SNOWFALL (IN)  
YESTERDAY 0.0 0.3 1968 0.0  
MONTH TO DATE 0.0 0.0  
SINCE OCT 1 12.9 0.7  
SINCE JUL 1 12.9 0.7  
SNOW DEPTH MM  
 
DEGREE DAYS  
HEATING  
YESTERDAY 17 15 2 16  
MONTH TO DATE 213 191 22 190  
SINCE MAR 1 810 765 45 808  
SINCE JUL 1 3707 4019 -312 3740  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE MAR 1 0 0 0 0  
SINCE JAN 1 0 0 0 0    
...............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 13 RESULTANT WIND DIRECTION N (0)  
HIGHEST WIND SPEED 25 HIGHEST WIND DIRECTION N (340)  
HIGHEST GUST SPEED 32 HIGHEST GUST DIRECTION N (350)  
AVERAGE WIND SPEED 13.1  
 
SKY COVER  
AVERAGE SKY COVER 0.2  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 82 600 AM  
LOWEST 39 1100 PM  
AVERAGE 61  
   
......................................................
 
 
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 58 75 1980  
MINIMUM TEMPERATURE (F) 42 32 1945  
 
SUNRISE AND SUNSET  
APRIL 13 2021.........SUNRISE 624 AM PDT SUNSET 756 PM PDT  
APRIL 14 2021.........SUNRISE 622 AM PDT SUNSET 758 PM PDT  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
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