952  
CDUS46 KSEW 180826  
CLISEA  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SEATTLE  
126 AM PDT SUN AUG 18 2024  
   
...............................  
 
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR AUGUST 17 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 79 316 PM 96 1977 78 1 91  
MINIMUM 56 304 AM 45 1951 57 -1 62  
AVERAGE 68 68 0 77  
 
PRECIPITATION (IN)  
YESTERDAY 0.47 0.93 1995 0.03 0.44 0.00  
MONTH TO DATE 0.47 0.44 0.03 0.04  
SINCE OCT 1 33.91 37.20 -3.29 29.04  
SINCE JAN 1 16.76 21.26 -4.50 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 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 0 1 -1 0  
MONTH TO DATE 2 10 -8 0  
SINCE JUN 1 141 159 -18 114  
SINCE JUL 1 9 41 -32 2  
 
COOLING  
YESTERDAY 3 3 0 12  
MONTH TO DATE 63 64 -1 135  
SINCE JUN 1 246 189 57 283  
SINCE JAN 1 253 199 54 318    
...............................................................  
 
WIND (MPH)  
RESULTANT WIND SPEED 7 RESULTANT WIND DIRECTION N (360)  
HIGHEST WIND SPEED 29 HIGHEST WIND DIRECTION S (200)  
HIGHEST GUST SPEED 41 HIGHEST GUST DIRECTION S (190)  
AVERAGE WIND SPEED 10.1  
 
SKY COVER  
AVERAGE SKY COVER 0.5  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
THUNDERSTORM  
RAIN  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 93 800 PM  
LOWEST 45 200 PM  
AVERAGE 69  
   
......................................................  
 
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 78 88 1991  
MINIMUM TEMPERATURE (F) 57 47 1951  
 
SUNRISE AND SUNSET  
AUGUST 18 2024........SUNRISE 610 AM PDT SUNSET 815 PM PDT  
AUGUST 19 2024........SUNRISE 612 AM PDT SUNSET 813 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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