987  
CDUS43 KLOT 130633  
CLIPWK  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE CHICAGO IL  
1232 AM CST WED DEC 13 2017  
 
   
...............................
 
 
   
..THE CHICAGO EXECUTIVE CLIMATE SUMMARY FOR DECEMBER 12 2017
 
 
CLIMATE NORMAL PERIOD 1981 TO 2010  
CLIMATE RECORD PERIOD 1996 TO 2017  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
..............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 31 1203 AM 51 2015 36 -5 32  
MINIMUM 17 756 AM -3 2000 22 -5 12  
AVERAGE 24 29 -5 22  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 0.43 2001 0.05 -0.05 0.00  
MONTH TO DATE 0.27 0.83 -0.56 0.85  
SINCE DEC 1 0.27 0.83 -0.56 0.85  
SINCE JAN 1 42.26 32.35 9.91 33.08  
 
DEGREE DAYS  
HEATING  
YESTERDAY 41 36 5 43  
MONTH TO DATE 370 412 -42 433  
SINCE DEC 1 370 412 -42 433  
SINCE JUL 1 1446 1682 -236 1287  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE DEC 1 0 0 0 0  
SINCE JAN 1 829 789 40 1071    
..............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 10 RESULTANT WIND DIRECTION NW (310)  
HIGHEST WIND SPEED 30 HIGHEST WIND DIRECTION NW (330)  
HIGHEST GUST SPEED 37 HIGHEST GUST DIRECTION NW (320)  
AVERAGE WIND SPEED 11.1  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
   
......................................................
 
 
 
THE CHICAGO EXECUTIVE CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 36 62 2015  
MINIMUM TEMPERATURE (F) 21 -5 2000  
 
 
SUNRISE AND SUNSET  
DECEMBER 13 2017......SUNRISE 712 AM CST SUNSET 420 PM CST  
DECEMBER 14 2017......SUNRISE 712 AM CST SUNSET 420 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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