720  
CDUS46 KSEW 220131  
CLISEA  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SEATTLE  
631 PM PDT TUE MAY 21 2024  
   
...............................
 
 
   
..THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR MAY 21 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 52 415 PM 93 1963 67 -15 60  
MINIMUM 46 237 AM 39 1960 50 -4 52  
AVERAGE 49 59 -10 56  
 
PRECIPITATION (IN)  
TODAY 0.58R 0.55 2012 0.06 0.52 T  
MONTH TO DATE 1.12 1.32 -0.20 0.92  
SINCE OCT 1 31.67 34.15 -2.48 27.68  
SINCE JAN 1 14.52 18.21 -3.69 12.79  
 
SNOWFALL (IN)  
TODAY 0.0 T 1953 0.0  
MONTH TO DATE 0.0 0.0  
SINCE OCT 1 0.3 8.1  
SINCE JUL 1 0.3 8.1  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 16 7 9 9  
MONTH TO DATE 196 181 15 101  
SINCE MAR 1 1165 1150 15 1179  
SINCE JUL 1 4055 4197 -142 4266  
 
COOLING  
TODAY 0 0 0 0  
MONTH TO DATE 7 0 7 31  
SINCE MAR 1 7 1 6 31  
SINCE JAN 1 7 1 6 31    
...............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 10 RESULTANT WIND DIRECTION S (190)  
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION S (200)  
HIGHEST GUST SPEED 25 HIGHEST GUST DIRECTION S (190)  
AVERAGE WIND SPEED 10.7  
 
SKY COVER  
AVERAGE SKY COVER 0.9  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
RAIN  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 90 800 AM  
LOWEST 71 1200 AM  
AVERAGE 81  
   
......................................................
 
 
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 68 86 1969  
MINIMUM TEMPERATURE (F) 50 37 1960  
 
SUNRISE AND SUNSET  
MAY 21 2024...........SUNRISE 525 AM PDT SUNSET 848 PM PDT  
MAY 22 2024...........SUNRISE 524 AM PDT SUNSET 849 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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