014  
CDUS43 KLOT 170730  
CLIDPA  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE CHICAGO IL  
230 AM CDT TUE AUG 17 2021  
   
...............................
 
 
...THE DU PAGE AIRPORT CLIMATE SUMMARY FOR AUGUST 16 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 81 2:53 PM 90 1997 82 -1 84  
2003  
MINIMUM 55 5:21 AM 49 2004 62 -7 61  
AVERAGE 68 72 -4 73  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 0.77 0.13 -0.13 0.00  
MONTH TO DATE 1.82 2.03 -0.21 0.96  
SINCE JUN 1 11.02 9.30 1.72 3.15  
SINCE JAN 1 16.17 21.56 -5.39 21.05  
 
DEGREE DAYS  
HEATING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 0 0 0 4  
SINCE JUN 1 11 37 -26 20  
SINCE JUL 1 0 4 -4 4  
 
COOLING  
YESTERDAY 3 7 -4 8  
MONTH TO DATE 133 126 7 117  
SINCE JUN 1 644 573 71 700  
SINCE JAN 1 725 629 96 751    
...............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 4 RESULTANT WIND DIRECTION E (70)  
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION E (70)  
HIGHEST GUST SPEED 16 HIGHEST GUST DIRECTION E (110)  
AVERAGE WIND SPEED 4.2  
 
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) 82 87 2015  
MINIMUM TEMPERATURE (F) 62 51 2013  
 
SUNRISE AND SUNSET  
AUGUST 17 2021........SUNRISE 6:03 AM CDT SUNSET 7:50 PM CDT  
AUGUST 18 2021........SUNRISE 6:04 AM CDT SUNSET 7:48 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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