489  
CDUS43 KLOT 210653  
CLIDPA  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE CHICAGO IL  
153 AM CDT TUE SEP 21 2021  
   
...............................
 
 
...THE DU PAGE AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 20 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 4:14 PM 93 2018 74 7 71  
MINIMUM 68 11:59 PM 40 2003 52 16 40  
2020  
AVERAGE 75 63 12 56  
 
PRECIPITATION (IN)  
YESTERDAY 0.35 0.77 0.11 0.24 0.00  
MONTH TO DATE 0.68 2.00 -1.32 3.48  
SINCE SEP 1 0.68 2.00 -1.32 3.48  
SINCE JAN 1 17.09 25.37 -8.28 24.53  
 
DEGREE DAYS  
HEATING  
YESTERDAY 0 4 -4 9  
MONTH TO DATE 0 43 -43 64  
SINCE SEP 1 0 43 -43 64  
SINCE JUL 1 0 54 -54 68  
 
COOLING  
YESTERDAY 10 2 8 0  
MONTH TO DATE 112 72 40 41  
SINCE SEP 1 112 72 40 41  
SINCE JAN 1 1023 796 227 934    
...............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 11 RESULTANT WIND DIRECTION S (170)  
HIGHEST WIND SPEED 25 HIGHEST WIND DIRECTION S (180)  
HIGHEST GUST SPEED 36 HIGHEST GUST DIRECTION S (190)  
AVERAGE WIND SPEED 11.5  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
HEAVY RAIN  
RAIN  
LIGHT RAIN  
FOG  
   
......................................................
 
 
THE DU PAGE AIRPORT CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 74 92 2017  
MINIMUM TEMPERATURE (F) 52 40 2006  
 
SUNRISE AND SUNSET  
SEPTEMBER 21 2021.....SUNRISE 6:40 AM CDT SUNSET 6:51 PM CDT  
SEPTEMBER 22 2021.....SUNRISE 6:41 AM CDT SUNSET 6:50 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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