623  
CDUS43 KLOT 200645  
CLIDPA  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE CHICAGO IL  
145 AM CDT SUN JUL 20 2025  
   
...............................  
 
...THE DUPAGE AIRPORT CLIMATE SUMMARY FOR JULY 19 2025...  
 
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)  
YESTERDAY  
MAXIMUM 83 5:47 PM 97 2011 84 -1 80  
MINIMUM 71 5:03 AM 54 2014 64 7 57  
AVERAGE 77 74 3 69  
 
PRECIPITATION (IN)  
YESTERDAY 0.24 1.44 2008 0.11 0.13 0.00  
MONTH TO DATE 4.54 2.15 2.39 4.11  
SINCE JUN 1 7.19 5.80 1.39 9.14  
SINCE JAN 1 15.25 18.06 -2.81 21.78  
 
DEGREE DAYS  
HEATING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 0 0 0 3  
SINCE JUN 1 18 33 -15 16  
SINCE JUL 1 0 0 0 3  
 
COOLING  
YESTERDAY 12 9 3 4  
MONTH TO DATE 214 167 47 164  
SINCE JUN 1 481 342 139 406  
SINCE JAN 1 514 398 116 460    
...............................................................  
 
WIND (MPH)  
HIGHEST WIND SPEED 17 HIGHEST WIND DIRECTION SW (230)  
HIGHEST GUST SPEED 24 HIGHEST GUST DIRECTION SW (230)  
AVERAGE WIND SPEED 6.6  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
THUNDERSTORM  
HEAVY RAIN  
RAIN  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 94 11:00 AM  
LOWEST 63 5:00 PM  
AVERAGE 79  
   
......................................................  
 
THE DUPAGE AIRPORT CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 84 97 2011  
MINIMUM TEMPERATURE (F) 64 54 2009  
 
SUNRISE AND SUNSET  
JULY 20 2025..........SUNRISE 5:36 AM CDT SUNSET 8:23 PM CDT  
JULY 21 2025..........SUNRISE 5:36 AM CDT SUNSET 8:22 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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