621  
CDUS46 KSEW 130832  
CLISEA  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SEATTLE  
132 AM PDT TUE AUG 13 2024  
   
...............................
 
 
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR AUGUST 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 73 321 PM 96 1977 78 -5 82  
MINIMUM 57 553 AM 49 1949 58 -1 63  
1950  
1953  
AVERAGE 65 68 -3 73  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 0.56 1965 0.03 -0.03 0.00  
MONTH TO DATE 0.00 0.29 -0.29 0.04  
SINCE OCT 1 33.44 37.05 -3.61 29.04  
SINCE JAN 1 16.29 21.11 -4.82 14.15  
 
SNOWFALL (IN)  
YESTERDAY 0.0 MM MM 0.0  
MONTH TO DATE 0.0 0.0  
SINCE OCT 1 0.3 8.1  
SINCE JUL 1 0.0 0.0  
SNOW DEPTH MM  
 
DEGREE DAYS  
HEATING  
YESTERDAY 0 1 -1 0  
MONTH TO DATE 2 5 -3 0  
SINCE JUN 1 141 154 -13 114  
SINCE JUL 1 9 36 -27 2  
 
COOLING  
YESTERDAY 0 4 -4 8  
MONTH TO DATE 53 48 5 61  
SINCE JUN 1 236 173 63 209  
SINCE JAN 1 243 183 60 244    
...............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 8 RESULTANT WIND DIRECTION SW (210)  
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION SW (220)  
HIGHEST GUST SPEED 24 HIGHEST GUST DIRECTION SW (210)  
AVERAGE WIND SPEED 8.8  
 
SKY COVER  
AVERAGE SKY COVER 0.7  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 80 300 AM  
LOWEST 40 200 PM  
AVERAGE 60  
   
......................................................
 
 
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 78 92 2002  
MINIMUM TEMPERATURE (F) 58 44 1955  
 
SUNRISE AND SUNSET  
AUGUST 13 2024........SUNRISE 604 AM PDT SUNSET 823 PM PDT  
AUGUST 14 2024........SUNRISE 605 AM PDT SUNSET 822 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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