964  
CDUS46 KSEW 260838  
CLISEA  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SEATTLE  
138 AM PDT THU SEP 26 2024  
   
...............................  
 
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 25 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 65 926 AM 85 1991 69 -4 63  
MINIMUM 55 1159 PM 36 1972 52 3 55  
AVERAGE 60 60 0 59  
 
PRECIPITATION (IN)  
YESTERDAY 0.10 0.82 2023 0.06 0.04 0.82  
MONTH TO DATE 0.51 1.25 -0.74 2.28  
SINCE OCT 1 35.61 38.98 -3.37 31.55  
SINCE JAN 1 18.46 23.04 -4.58 16.66  
 
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 5 5 0 6  
MONTH TO DATE 70 74 -4 63  
SINCE SEP 1 70 74 -4 63  
SINCE JUL 1 108 129 -21 75  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 42 30 12 26  
SINCE SEP 1 42 30 12 26  
SINCE JAN 1 315 263 52 378    
...............................................................  
 
WIND (MPH)  
RESULTANT WIND SPEED 9 RESULTANT WIND DIRECTION S (200)  
HIGHEST WIND SPEED 20 HIGHEST WIND DIRECTION SW (220)  
HIGHEST GUST SPEED 29 HIGHEST GUST DIRECTION S (200)  
AVERAGE WIND SPEED 9.6  
 
SKY COVER  
AVERAGE SKY COVER 0.9  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 93 500 PM  
LOWEST 72 300 AM  
AVERAGE 83  
   
......................................................  
 
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 68 82 2022  
MINIMUM TEMPERATURE (F) 52 39 1972  
 
SUNRISE AND SUNSET  
SEPTEMBER 26 2024.....SUNRISE 702 AM PDT SUNSET 657 PM PDT  
SEPTEMBER 27 2024.....SUNRISE 704 AM PDT SUNSET 655 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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