155  
CDUS46 KSEW 260118  
CLISEA  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SEATTLE  
618 PM PDT WED SEP 25 2024  
   
...............................  
 
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 25 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 65 926 AM 85 1991 69 -4 63  
MINIMUM 59 636 AM 36 1972 52 7 55  
AVERAGE 62 60 2 59  
 
PRECIPITATION (IN)  
TODAY 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)  
TODAY 0.0 MM MM 0.0  
MONTH TO DATE 0.0 0.0  
SINCE OCT 1 0.3 8.1  
SINCE JUL 1 0.0 0.0  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 3 5 -2 6  
MONTH TO DATE 68 74 -6 63  
SINCE SEP 1 68 74 -6 63  
SINCE JUL 1 106 129 -23 75  
 
COOLING  
TODAY 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 8 RESULTANT WIND DIRECTION S (200)  
HIGHEST WIND SPEED 20 HIGHEST WIND DIRECTION SW (220)  
HIGHEST GUST SPEED 25 HIGHEST GUST DIRECTION SW (220)  
AVERAGE WIND SPEED 8.7  
 
SKY COVER  
AVERAGE SKY COVER 0.9  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 90 1200 PM  
LOWEST 72 300 AM  
AVERAGE 81  
   
......................................................  
 
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 68 82 2022  
MINIMUM TEMPERATURE (F) 52 39 1972  
 
SUNRISE AND SUNSET  
SEPTEMBER 25 2024.....SUNRISE 701 AM PDT SUNSET 659 PM PDT  
SEPTEMBER 26 2024.....SUNRISE 702 AM PDT SUNSET 657 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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