489  
CDUS46 KSEW 120827  
CLISEA  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SEATTLE  
127 AM PDT MON AUG 12 2024  
   
...............................  
 
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR AUGUST 11 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 71 334 PM 96 2014 78 -7 79  
MINIMUM 59 1159 PM 46 1954 58 1 59  
AVERAGE 65 68 -3 69  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 0.32 2009 0.03 -0.03 0.00  
MONTH TO DATE 0.00 0.26 -0.26 0.04  
SINCE OCT 1 33.44 37.02 -3.58 29.04  
SINCE JAN 1 16.29 21.08 -4.79 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 4 -2 0  
SINCE JUN 1 141 153 -12 114  
SINCE JUL 1 9 35 -26 2  
 
COOLING  
YESTERDAY 0 4 -4 4  
MONTH TO DATE 53 44 9 53  
SINCE JUN 1 236 169 67 201  
SINCE JAN 1 243 179 64 236    
...............................................................  
 
WIND (MPH)  
RESULTANT WIND SPEED 6 RESULTANT WIND DIRECTION SW (230)  
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION W (260)  
HIGHEST GUST SPEED 20 HIGHEST GUST DIRECTION W (250)  
AVERAGE WIND SPEED 7.5  
 
SKY COVER  
AVERAGE SKY COVER 0.8  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
FOG  
HAZE  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 93 800 AM  
LOWEST 59 300 PM  
AVERAGE 76  
   
......................................................  
 
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 78 96 1977  
MINIMUM TEMPERATURE (F) 58 49 1949  
1950  
1953  
 
SUNRISE AND SUNSET  
AUGUST 12 2024........SUNRISE 602 AM PDT SUNSET 825 PM PDT  
AUGUST 13 2024........SUNRISE 604 AM PDT SUNSET 823 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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