297  
CDUS46 KSEW 160121  
CLISEA  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SEATTLE  
621 PM PDT WED MAY 15 2024  
   
...............................
 
 
   
..THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR MAY 15 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 75 446 PM 88 2023 66 9 88  
MINIMUM 51 526 AM 38 1964 49 2 58  
AVERAGE 63 58 5 73  
 
PRECIPITATION (IN)  
TODAY 0.00 0.81 2011 0.06 -0.06 0.12  
MONTH TO DATE 0.28 0.98 -0.70 0.91  
SINCE OCT 1 30.83 33.81 -2.98 27.67  
SINCE JAN 1 13.68 17.87 -4.19 12.78  
 
SNOWFALL (IN)  
TODAY 0.0 T 1974 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 127 138 -11 92  
SINCE MAR 1 1096 1107 -11 1170  
SINCE JUL 1 3986 4154 -168 4257  
 
COOLING  
TODAY 0 0 0 8  
MONTH TO DATE 7 0 7 25  
SINCE MAR 1 7 1 6 25  
SINCE JAN 1 7 1 6 25    
...............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 4 RESULTANT WIND DIRECTION N (350)  
HIGHEST WIND SPEED 10 HIGHEST WIND DIRECTION W (250)  
HIGHEST GUST SPEED 15 HIGHEST GUST DIRECTION W (290)  
AVERAGE WIND SPEED 5.5  
 
SKY COVER  
AVERAGE SKY COVER 0.7  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 80 500 AM  
LOWEST 37 400 PM  
AVERAGE 59  
   
......................................................
 
 
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 67 84 1985  
2008  
MINIMUM TEMPERATURE (F) 49 40 2003  
 
SUNRISE AND SUNSET  
MAY 15 2024...........SUNRISE 532 AM PDT SUNSET 840 PM PDT  
MAY 16 2024...........SUNRISE 530 AM PDT SUNSET 842 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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