845  
CDUS46 KSEW 130117  
CLISEA  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SEATTLE  
617 PM PDT SUN MAY 12 2024  
   
...............................
 
 
   
..THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR MAY 12 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 75 459 PM 82 2023 66 9 82  
MINIMUM 51 459 AM 38 1964 48 3 52  
1985  
2011  
AVERAGE 63 57 6 67  
 
PRECIPITATION (IN)  
TODAY 0.00 0.71 1996 0.06 -0.06 0.00  
MONTH TO DATE 0.28 0.80 -0.52 0.79  
SINCE OCT 1 30.83 33.63 -2.80 27.55  
SINCE JAN 1 13.68 17.69 -4.01 12.66  
 
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 0.3 8.1  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 2 8 -6 0  
MONTH TO DATE 113 114 -1 92  
SINCE MAR 1 1082 1083 -1 1170  
SINCE JUL 1 3972 4130 -158 4257  
 
COOLING  
TODAY 0 0 0 2  
MONTH TO DATE 7 0 7 2  
SINCE MAR 1 7 1 6 2  
SINCE JAN 1 7 1 6 2    
...............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 2 RESULTANT WIND DIRECTION NW (300)  
HIGHEST WIND SPEED 12 HIGHEST WIND DIRECTION N (360)  
HIGHEST GUST SPEED 15 HIGHEST GUST DIRECTION NE (30)  
AVERAGE WIND SPEED 5.6  
 
SKY COVER  
AVERAGE SKY COVER 0.1  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 83 500 AM  
LOWEST 37 400 PM  
AVERAGE 60  
   
......................................................
 
 
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 66 86 2023  
MINIMUM TEMPERATURE (F) 48 37 1956  
 
SUNRISE AND SUNSET  
MAY 12 2024...........SUNRISE 535 AM PDT SUNSET 837 PM PDT  
MAY 13 2024...........SUNRISE 534 AM PDT SUNSET 838 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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