406  
CDUS43 KLOT 032136  
CLIDPA  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE CHICAGO IL  
436 PM CDT WED SEP 03 2025  
   
...............................
 
 
...THE DUPAGE AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 3 2025...  
VALID TODAY AS OF 0400 PM LOCAL TIME.  
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1997 TO 2025  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
TODAY  
MAXIMUM 70 2:53 PM 91 2023 79 -9 77  
MINIMUM 60 5:46 AM 49 2024 58 2 49  
AVERAGE 65 69 -4 63  
 
PRECIPITATION (IN)  
TODAY 0.01 0.97 2018 0.10 -0.09 0.00  
MONTH TO DATE 0.01 0.30 -0.29 0.00  
SINCE SEP 1 0.01 0.30 -0.29 0.00  
SINCE JAN 1 20.54 23.67 -3.13 24.32  
 
DEGREE DAYS  
HEATING  
TODAY 0 1 -1 2  
MONTH TO DATE 0 3 -3 3  
SINCE SEP 1 0 3 -3 3  
SINCE JUL 1 11 14 -3 12  
 
COOLING  
TODAY 0 5 -5 0  
MONTH TO DATE 2 15 -13 2  
SINCE SEP 1 2 15 -13 2  
SINCE JAN 1 910 739 171 800    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 20 HIGHEST WIND DIRECTION SW (240)  
HIGHEST GUST SPEED 30 HIGHEST GUST DIRECTION SW (240)  
AVERAGE WIND SPEED 8.7  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
LIGHT RAIN  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 83 5:00 AM  
LOWEST 68 9:00 AM  
AVERAGE 76  
   
......................................................
 
 
THE DUPAGE AIRPORT CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 79 93 2012  
MINIMUM TEMPERATURE (F) 58 49 2000  
2020  
2024  
 
SUNRISE AND SUNSET  
SEPTEMBER 3 2025.....SUNRISE 6:21 AM CDT SUNSET 7:23 PM CDT  
SEPTEMBER 4 2025.....SUNRISE 6:22 AM CDT SUNSET 7:21 PM CDT  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
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