154  
CDUS46 KSEW 210119  
CLISEA  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SEATTLE  
619 PM PDT TUE AUG 20 2024  
   
...............................
 
 
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR AUGUST 20 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 68 245 PM 91 2016 77 -9 80  
MINIMUM 58 517 AM 45 1945 57 1 58  
AVERAGE 63 67 -4 69  
 
PRECIPITATION (IN)  
TODAY 0.17 0.70 2008 0.04 0.13 0.00  
MONTH TO DATE 0.64 0.55 0.09 0.04  
SINCE OCT 1 34.08 37.31 -3.23 29.04  
SINCE JAN 1 16.93 21.37 -4.44 14.15  
 
SNOWFALL (IN)  
TODAY 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  
TODAY 2 1 1 0  
MONTH TO DATE 4 13 -9 0  
SINCE JUN 1 143 162 -19 114  
SINCE JUL 1 11 44 -33 2  
 
COOLING  
TODAY 0 3 -3 4  
MONTH TO DATE 69 73 -4 140  
SINCE JUN 1 252 198 54 288  
SINCE JAN 1 259 208 51 323    
...............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 5 RESULTANT WIND DIRECTION S (160)  
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION SE (140)  
HIGHEST GUST SPEED 17 HIGHEST GUST DIRECTION SE (150)  
AVERAGE WIND SPEED 5.5  
 
SKY COVER  
AVERAGE SKY COVER 0.9  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
RAIN  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 90 500 AM  
LOWEST 63 300 PM  
AVERAGE 77  
   
......................................................
 
 
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 77 91 2018  
MINIMUM TEMPERATURE (F) 57 44 1947  
 
SUNRISE AND SUNSET  
AUGUST 20 2024........SUNRISE 613 AM PDT SUNSET 811 PM PDT  
AUGUST 21 2024........SUNRISE 614 AM PDT SUNSET 809 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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