663  
CDUS43 KLOT 170631  
CLIDPA  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE CHICAGO IL  
1231 AM CST SUN DEC 17 2017  
 
   
...............................
 
 
 
...THE DU PAGE AIRPORT CLIMATE SUMMARY FOR DECEMBER 16 2017...  
 
CLIMATE NORMAL PERIOD 1981 TO 2010  
CLIMATE RECORD PERIOD 1997 TO 2017  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
..............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 46 317 PM 54 2015 35 11 20  
2006  
MINIMUM 25 1011 PM 3 2013 19 6 8  
AVERAGE 36 27 9 14  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 0.17 0.05 -0.05 0.07  
MONTH TO DATE 0.47 0.97 -0.50 0.79  
SINCE DEC 1 0.47 0.97 -0.50 0.79  
SINCE JAN 1 37.03 36.16 0.87 32.08  
 
DEGREE DAYS  
HEATING  
YESTERDAY 29 38 -9 51  
MONTH TO DATE 546 569 -23 675  
SINCE DEC 1 546 569 -23 675  
SINCE JUL 1 1756 1823 -67 1586  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE DEC 1 0 0 0 0  
SINCE JAN 1 695 814 -119 1007    
..............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 6 RESULTANT WIND DIRECTION SW (210)  
HIGHEST WIND SPEED 17 HIGHEST WIND DIRECTION SW (210)  
HIGHEST GUST SPEED 25 HIGHEST GUST DIRECTION SW (210)  
AVERAGE WIND SPEED 6.9  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
FOG  
 
   
......................................................
 
 
 
THE DU PAGE AIRPORT CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 34 54 2006  
MINIMUM TEMPERATURE (F) 18 -2 2000  
 
 
SUNRISE AND SUNSET  
DECEMBER 17 2017......SUNRISE 715 AM CST SUNSET 423 PM CST  
DECEMBER 18 2017......SUNRISE 716 AM CST SUNSET 424 PM CST  
 
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
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