628  
CDUS43 KLOT 160634  
CLILOT  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE CHICAGO IL  
1234 AM CST TUE DEC 16 2025  
   
...............................
 
 
   
..THE ROMEOVILLE WFO CLIMATE SUMMARY FOR DECEMBER 15 2025
 
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1992 TO 2025  
 
WEATHER ITEM OBSERVED RECORD YEAR NORMAL DEPARTURE LAST  
VALUE VALUE VALUE FROM YEAR  
NORMAL    
........................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 21 64 2021 37 -16 43  
MINIMUM 0 -2 2016 22 -22 39  
AVERAGE 11 30 -19 41  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 0.96 1992 0.07 -0.07 0.04  
MONTH TO DATE 0.45 1.05 -0.60 0.53  
SINCE DEC 1 0.45 1.05 -0.60 0.53  
SINCE JAN 1 29.65 40.04 -10.39 40.35  
 
SNOWFALL (IN)  
YESTERDAY 0.0 2.7 2007 0.3 -0.3 0.0  
MONTH TO DATE 4.5 3.0 1.5 0.1  
SINCE DEC 1 4.5 3.0 1.5 0.1  
SINCE JUL 1 15.1 4.3 10.8 2.3  
SNOW DEPTH 2  
 
DEGREE DAYS  
HEATING  
YESTERDAY 54 36 18 24  
MONTH TO DATE 684 500 184 571  
SINCE DEC 1 684 500 184 571  
SINCE JUL 1 1761 1692 69 1433  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE DEC 1 0 0 0 0  
SINCE JAN 1 1077 947 130 1040    
........................................................
 
 
THE ROMEOVILLE WFO CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 37 64 2021  
MINIMUM TEMPERATURE (F) 22 5 2009  
 
SUNRISE AND SUNSET  
DECEMBER 16 2025......SUNRISE 7:13 AM CST SUNSET 4:23 PM CST  
DECEMBER 17 2025......SUNRISE 7:14 AM CST SUNSET 4:24 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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