391  
CDUS46 KSEW 240125  
CLISEA  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SEATTLE  
625 PM PDT SAT SEP 23 2023  
   
...............................
 
 
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 23 2023...  
VALID TODAY AS OF 0500 PM LOCAL TIME.  
 
CLIMATE NORMAL PERIOD 1991 TO 2020  
CLIMATE RECORD PERIOD 1945 TO 2023  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
TODAY  
MAXIMUM 64 1123 AM 84 1947 69 -5 69  
MINIMUM 56 459 PM 40 1948 52 4 55  
AVERAGE 60 61 -1 62  
 
PRECIPITATION (IN)  
TODAY 0.14 1.08 2020 0.06 0.08 0.00  
MONTH TO DATE 0.84 1.13 -0.29 0.22  
SINCE OCT 1 30.11 38.86 -8.75 45.45  
SINCE JAN 1 15.22 22.92 -7.70 25.35  
 
SNOWFALL (IN)  
TODAY 0.0 MM MM 0.0  
MONTH TO DATE 0.0 0.0  
SINCE OCT 1 8.1 9.2  
SINCE JUL 1 0.0 0.0  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 5 5 0 3  
MONTH TO DATE 49 64 -15 23  
SINCE SEP 1 49 64 -15 23  
SINCE JUL 1 61 119 -58 43  
 
COOLING  
TODAY 0 0 0 0  
MONTH TO DATE 26 30 -4 31  
SINCE SEP 1 26 30 -4 31  
SINCE JAN 1 378 263 115 375    
...............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 7 RESULTANT WIND DIRECTION S (200)  
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION SW (240)  
HIGHEST GUST SPEED 22 HIGHEST GUST DIRECTION SW (220)  
AVERAGE WIND SPEED 7.7  
 
SKY COVER  
AVERAGE SKY COVER 0.9  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 87 200 PM  
LOWEST 53 1200 AM  
AVERAGE 70  
   
......................................................
 
 
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 69 89 1974  
MINIMUM TEMPERATURE (F) 52 38 1948  
 
SUNRISE AND SUNSET  
SEPTEMBER 23 2023.....SUNRISE 657 AM PDT SUNSET 705 PM PDT  
SEPTEMBER 24 2023.....SUNRISE 659 AM PDT SUNSET 703 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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