078  
CDUS46 KSEW 240125  
CLISEA  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SEATTLE WA  
625 PM PDT WED SEP 23 2020  
 
   
...............................
 
 
 
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 23 2020...  
VALID TODAY AS OF 0500 PM LOCAL TIME.  
 
CLIMATE NORMAL PERIOD 1981 TO 2010  
CLIMATE RECORD PERIOD 1945 TO 2020  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
..............................................................
 
 
TEMPERATURE (F)  
TODAY  
MAXIMUM 63 334 PM 84 1947 68 -5 62  
MINIMUM 58 410 AM 40 1948 51 7 56  
AVERAGE 61 60 1 59  
 
PRECIPITATION (IN)  
TODAY 0.94R 0.72 2014 0.05 0.89 0.12  
MONTH TO DATE 1.51 1.05 0.46 2.89  
SINCE OCT 1 38.88 37.04 1.84 35.39  
SINCE JAN 1 25.54 21.64 3.90 20.11  
 
SNOWFALL (IN)  
TODAY 0.0 MM MM 0.0  
MONTH TO DATE 0.0 0.0  
SINCE OCT 1 0.7 21.0  
SINCE JUL 1 0.0 0.0  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 4 6 -2 6  
MONTH TO DATE 31 83 -52 39  
SINCE SEP 1 31 83 -52 39  
SINCE JUL 1 66 168 -102 52  
 
COOLING  
TODAY 0 0 0 0  
MONTH TO DATE 68 19 49 32  
SINCE SEP 1 68 19 49 32  
SINCE JAN 1 329 187 142 323    
..............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 10 RESULTANT WIND DIRECTION SE (150)  
HIGHEST WIND SPEED 21 HIGHEST WIND DIRECTION S (170)  
HIGHEST GUST SPEED 27 HIGHEST GUST DIRECTION SE (140)  
AVERAGE WIND SPEED 10.5  
 
 
SKY COVER  
AVERAGE SKY COVER 0.9  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
RAIN  
LIGHT RAIN  
FOG  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 93 400 AM  
LOWEST 72 1200 AM  
AVERAGE 83  
   
......................................................
 
 
 
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 68 89 1974  
MINIMUM TEMPERATURE (F) 50 38 1948  
 
 
SUNRISE AND SUNSET  
SEPTEMBER 23 2020.....SUNRISE 658 AM PDT SUNSET 704 PM PDT  
SEPTEMBER 24 2020.....SUNRISE 700 AM PDT SUNSET 701 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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