215  
CDUS43 KLOT 220636  
CLIDPA  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE CHICAGO IL  
136 AM CDT THU JUL 22 2021  
   
...............................
 
 
...THE DU PAGE AIRPORT CLIMATE SUMMARY FOR JULY 21 2021...  
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1997 TO 2021  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 76 3:45 PM 97 2011 84 -8 79  
MINIMUM 62 11:59 PM 52 2007 64 -2 70  
AVERAGE 69 74 -5 75  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.83 0.12 -0.12 0.06  
MONTH TO DATE 1.89 2.40 -0.51 1.28  
SINCE JUN 1 8.60 6.05 2.55 1.78  
SINCE JAN 1 13.75 18.31 -4.56 19.68  
 
DEGREE DAYS  
HEATING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE JUN 1 11 33 -22 16  
SINCE JUL 1 0 0 0 0  
 
COOLING  
YESTERDAY 4 9 -5 10  
MONTH TO DATE 148 185 -37 245  
SINCE JUN 1 398 360 38 480  
SINCE JAN 1 479 416 63 531    
...............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 6 RESULTANT WIND DIRECTION NE (50)  
HIGHEST WIND SPEED 12 HIGHEST WIND DIRECTION NE (40)  
HIGHEST GUST SPEED 16 HIGHEST GUST DIRECTION NE (50)  
AVERAGE WIND SPEED 6.2  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
   
......................................................
 
 
THE DU PAGE AIRPORT CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 84 94 2001  
MINIMUM TEMPERATURE (F) 64 53 2000  
2007  
 
SUNRISE AND SUNSET  
JULY 22 2021..........SUNRISE 5:37 AM CDT SUNSET 8:21 PM CDT  
JULY 23 2021..........SUNRISE 5:38 AM CDT SUNSET 8:20 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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