542  
CDUS46 KSEW 210117  
CLISEA  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SEATTLE  
617 PM PDT SAT JUL 20 2024  
   
...............................
 
 
   
..THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR JULY 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 88 423 PM 100 1994 78 10 82  
MINIMUM 62 502 AM 50 1953 57 5 60  
1955  
1962  
AVERAGE 75 68 7 71  
 
PRECIPITATION (IN)  
TODAY 0.00 0.60 2012 0.02 -0.02 0.00  
MONTH TO DATE 0.00 0.42 -0.42 0.00  
SINCE OCT 1 33.28 36.58 -3.30 28.91  
SINCE JAN 1 16.13 20.64 -4.51 14.02  
 
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 0 1 -1 0  
MONTH TO DATE 2 26 -24 2  
SINCE JUN 1 134 144 -10 114  
SINCE JUL 1 2 26 -24 2  
 
COOLING  
TODAY 10 4 6 6  
MONTH TO DATE 146 52 94 89  
SINCE JUN 1 165 81 84 118  
SINCE JAN 1 172 91 81 153    
...............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 6 RESULTANT WIND DIRECTION N (350)  
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION N (340)  
HIGHEST GUST SPEED 18 HIGHEST GUST DIRECTION N (360)  
AVERAGE WIND SPEED 7.0  
 
SKY COVER  
AVERAGE SKY COVER 0.0  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 70 300 AM  
LOWEST 28 200 PM  
AVERAGE 49  
   
......................................................
 
 
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 79 97 2006  
MINIMUM TEMPERATURE (F) 58 48 1951  
 
SUNRISE AND SUNSET  
JULY 20 2024..........SUNRISE 534 AM PDT SUNSET 857 PM PDT  
JULY 21 2024..........SUNRISE 535 AM PDT SUNSET 856 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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