433  
CDUS43 KLOT 160632  
CLIDPA  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE CHICAGO IL  
132 AM CDT THU SEP 16 2021  
   
...............................
 
 
...THE DU PAGE AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 15 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 79 2:47 PM 86 2009 76 3 77  
2017  
MINIMUM 54 11:59 PM 36 2007 54 0 55  
AVERAGE 67 65 2 66  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 0.59 0.10 -0.10 0.00  
MONTH TO DATE 0.02 1.49 -1.47 3.48  
SINCE SEP 1 0.02 1.49 -1.47 3.48  
SINCE JAN 1 16.43 24.86 -8.43 24.53  
 
DEGREE DAYS  
HEATING  
YESTERDAY 0 3 -3 0  
MONTH TO DATE 0 25 -25 22  
SINCE SEP 1 0 25 -25 22  
SINCE JUL 1 0 36 -36 26  
 
COOLING  
YESTERDAY 2 3 -1 1  
MONTH TO DATE 77 60 17 36  
SINCE SEP 1 77 60 17 36  
SINCE JAN 1 988 784 204 929    
...............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 2 RESULTANT WIND DIRECTION NE (30)  
HIGHEST WIND SPEED 12 HIGHEST WIND DIRECTION NE (50)  
HIGHEST GUST SPEED 16 HIGHEST GUST DIRECTION N (10)  
AVERAGE WIND SPEED 4.1  
 
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) 76 89 2018  
MINIMUM TEMPERATURE (F) 54 39 2000  
 
SUNRISE AND SUNSET  
SEPTEMBER 16 2021.....SUNRISE 6:34 AM CDT SUNSET 7:00 PM CDT  
SEPTEMBER 17 2021.....SUNRISE 6:35 AM CDT SUNSET 6:58 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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