465  
CDUS46 KSEW 300119  
CLISEA  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SEATTLE  
619 PM PDT TUE AUG 29 2023  
   
...............................
 
 
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR AUGUST 29 2023...  
VALID TODAY AS OF 0500 PM LOCAL TIME.  
 
CLIMATE NORMAL PERIOD 1991 TO 2020  
CLIMATE RECORD PERIOD 1945 TO 2023  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
TODAY  
MAXIMUM 62 1241 AM 91 1974 76 -14 85  
MINIMUM 58 701 AM 44 1951 56 2 56  
AVERAGE 60 66 -6 71  
 
PRECIPITATION (IN)  
TODAY 0.10 1.28 2015 0.04 0.06 0.00  
MONTH TO DATE 0.22 0.89 -0.67 0.05  
SINCE OCT 1 29.22 37.65 -8.43 45.23  
SINCE JAN 1 14.33 21.71 -7.38 25.13  
 
SNOWFALL (IN)  
TODAY 0.0 MM MM 0.0  
MONTH TO DATE 0.0 0.0  
SINCE OCT 1 8.1 9.2  
SINCE JUL 1 0.0 0.0  
SNOW DEPTH MM  
 
DEGREE DAYS  
HEATING  
TODAY 5 1 4 0  
MONTH TO DATE 9 22 -13 3  
SINCE JUN 1 123 171 -48 160  
SINCE JUL 1 11 53 -42 20  
 
COOLING  
TODAY 0 2 -2 6  
MONTH TO DATE 167 94 73 148  
SINCE JUN 1 315 219 96 325  
SINCE JAN 1 350 229 121 325    
...............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 5 RESULTANT WIND DIRECTION S (160)  
HIGHEST WIND SPEED 12 HIGHEST WIND DIRECTION E (70)  
HIGHEST GUST SPEED 19 HIGHEST GUST DIRECTION E (70)  
AVERAGE WIND SPEED 6.7  
 
SKY COVER  
AVERAGE SKY COVER 1.0  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
THUNDERSTORM  
RAIN  
LIGHT RAIN  
FOG  
HAZE  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 93 300 AM  
LOWEST 78 100 AM  
AVERAGE 86  
   
......................................................
 
 
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 76 90 2022  
MINIMUM TEMPERATURE (F) 56 45 1950  
 
SUNRISE AND SUNSET  
AUGUST 29 2023........SUNRISE 624 AM PDT SUNSET 755 PM PDT  
AUGUST 30 2023........SUNRISE 625 AM PDT SUNSET 753 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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