069  
CDUS46 KSEW 160833  
CLISEA  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SEATTLE  
133 AM PDT MON SEP 16 2024  
   
...............................
 
 
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 15 2024...  
 
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)  
YESTERDAY  
MAXIMUM 64 500 PM 93 1967 72 -8 84  
MINIMUM 53 710 AM 42 1952 54 -1 54  
AVERAGE 59 63 -4 69  
 
PRECIPITATION (IN)  
YESTERDAY 0.02 0.69 1959 0.05 -0.03 0.00  
MONTH TO DATE 0.39 0.69 -0.30 0.18  
SINCE OCT 1 35.49 38.42 -2.93 29.45  
SINCE JAN 1 18.34 22.48 -4.14 14.56  
 
SNOWFALL (IN)  
YESTERDAY 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  
YESTERDAY 6 3 3 0  
MONTH TO DATE 29 33 -4 19  
SINCE SEP 1 29 33 -4 19  
SINCE JUL 1 65 88 -23 31  
 
COOLING  
YESTERDAY 0 1 -1 4  
MONTH TO DATE 37 24 13 24  
SINCE SEP 1 37 24 13 24  
SINCE JAN 1 310 257 53 376    
...............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 5 RESULTANT WIND DIRECTION N (20)  
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION N (340)  
HIGHEST GUST SPEED 17 HIGHEST GUST DIRECTION N (340)  
AVERAGE WIND SPEED 6.7  
 
SKY COVER  
AVERAGE SKY COVER 0.8  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT RAIN  
FOG  
HAZE  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 93 100 AM  
LOWEST 63 400 PM  
AVERAGE 78  
   
......................................................
 
 
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 72 91 1967  
MINIMUM TEMPERATURE (F) 54 44 1952  
1992  
 
SUNRISE AND SUNSET  
SEPTEMBER 16 2024.....SUNRISE 649 AM PDT SUNSET 718 PM PDT  
SEPTEMBER 17 2024.....SUNRISE 650 AM PDT SUNSET 716 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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