435  
CDUS43 KLOT 172135  
CLIDPA  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE CHICAGO IL  
435 PM CDT FRI SEP 17 2021  
   
...............................
 
 
...THE DU PAGE AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 17 2021...  
VALID TODAY AS OF 0400 PM LOCAL TIME.  
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1997 TO 2021  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE  
VALUE (LST) VALUE VALUE FROM  
NORMAL    
............................................................
 
 
TEMPERATURE (F)  
TODAY  
MAXIMUM 90 2:22 PM 92 2018 75 15  
MINIMUM 55 5:57 AM 40 1999 53 2  
AVERAGE 73 64 9  
 
PRECIPITATION (IN)  
TODAY 0.00 0.44 2015 0.10 -0.10  
MONTH TO DATE 0.02 1.69 -1.67  
SINCE SEP 1 0.02 1.69 -1.67  
SINCE JAN 1 16.43 25.06 -8.63  
 
DEGREE DAYS  
HEATING  
TODAY 0 3 -3  
MONTH TO DATE 0 31 -31  
SINCE SEP 1 0 31 -31  
SINCE JUL 1 0 42 -42  
 
COOLING  
TODAY 8 3 5  
MONTH TO DATE 87 66 21  
SINCE SEP 1 87 66 21  
SINCE JAN 1 998 790 208    
............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 7 RESULTANT WIND DIRECTION SW (210)  
HIGHEST WIND SPEED 17 HIGHEST WIND DIRECTION SW (220)  
HIGHEST GUST SPEED 29 HIGHEST GUST DIRECTION SW (220)  
AVERAGE WIND SPEED 7.5  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
   
......................................................
 
 
THE DU PAGE AIRPORT CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 75 88 2007  
MINIMUM TEMPERATURE (F) 53 41 2012  
 
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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