825  
CDUS43 KLOT 212142  
CLIDPA  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE CHICAGO IL  
442 PM CDT WED MAY 21 2025  
   
...............................
 
 
...THE DUPAGE AIRPORT CLIMATE SUMMARY FOR MAY 21 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 53 12:53 PM 89 2024 73 -20 89  
MINIMUM 49 7:04 AM 26 2002 51 -2 62  
AVERAGE 51 62 -11 76  
 
PRECIPITATION (IN)  
TODAY 0.01 1.48 2018 0.14 -0.13 0.00  
MONTH TO DATE 1.34 3.03 -1.69 2.12  
SINCE MAR 1 6.24 8.44 -2.20 8.89  
SINCE JAN 1 7.81 10.95 -3.14 11.34  
 
DEGREE DAYS  
HEATING  
TODAY 14 5 9 0  
MONTH TO DATE 157 170 -13 71  
SINCE MAR 1 1261 1512 -251 1162  
SINCE JUL 1 5581 6289 -708 5223  
 
COOLING  
TODAY 0 2 -2 11  
MONTH TO DATE 27 22 5 36  
SINCE MAR 1 33 28 5 44  
SINCE JAN 1 33 28 5 44    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION NW (300)  
HIGHEST GUST SPEED 22 HIGHEST GUST DIRECTION NW (300)  
AVERAGE WIND SPEED 9.6  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 93 12:00 AM  
LOWEST 83 12:00 PM  
AVERAGE 88  
   
......................................................
 
 
THE DUPAGE AIRPORT CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 73 88 2011  
MINIMUM TEMPERATURE (F) 51 34 2006  
 
SUNRISE AND SUNSET  
MAY 21 2025...........SUNRISE 5:27 AM CDT SUNSET 8:13 PM CDT  
MAY 22 2025...........SUNRISE 5:26 AM CDT SUNSET 8:14 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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