950  
CDUS43 KLOT 170633  
CLIDPA  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE CHICAGO IL  
133 AM CDT FRI SEP 17 2021  
   
...............................
 
 
...THE DU PAGE AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 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 83 2:10 PM 89 2018 76 7 83  
MINIMUM 50 4:33 AM 39 2000 54 -4 56  
AVERAGE 67 65 2 70  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 0.01 0.10 -0.10 0.00  
MONTH TO DATE 0.02 1.59 -1.57 3.48  
SINCE SEP 1 0.02 1.59 -1.57 3.48  
SINCE JAN 1 16.43 24.96 -8.53 24.53  
 
DEGREE DAYS  
HEATING  
YESTERDAY 0 3 -3 0  
MONTH TO DATE 0 28 -28 22  
SINCE SEP 1 0 28 -28 22  
SINCE JUL 1 0 39 -39 26  
 
COOLING  
YESTERDAY 2 3 -1 5  
MONTH TO DATE 79 63 16 41  
SINCE SEP 1 79 63 16 41  
SINCE JAN 1 990 787 203 934    
...............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 4 RESULTANT WIND DIRECTION S (170)  
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION S (160)  
HIGHEST GUST SPEED 24 HIGHEST GUST DIRECTION S (180)  
AVERAGE WIND SPEED 4.6  
 
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) 75 92 2018  
MINIMUM TEMPERATURE (F) 53 40 1999  
 
SUNRISE AND SUNSET  
SEPTEMBER 17 2021.....SUNRISE 6:35 AM CDT SUNSET 6:58 PM CDT  
SEPTEMBER 18 2021.....SUNRISE 6:36 AM CDT SUNSET 6:57 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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