575  
CDUS43 KLOT 130632  
CLIORD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE CHICAGO IL  
1232 AM CST WED DEC 13 2023  
   
...............................
 
 
   
..THE CHICAGO-OHARE CLIMATE SUMMARY FOR DECEMBER 12 2023
 
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1871 TO 2023  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 38 1:25 PM 61 1877 37 1 42  
MINIMUM 27 11:59 PM -8 2000 25 2 35  
AVERAGE 33 31 2 39  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.76 1972 0.06 -0.06 T  
MONTH TO DATE 1.30 0.89 0.41 0.48  
SINCE DEC 1 1.30 0.89 0.41 0.48  
SINCE JAN 1 32.06 36.64 -4.58 30.31  
 
SNOWFALL (IN)  
YESTERDAY 0.0 11.3 1903 0.2 -0.2 0.0  
MONTH TO DATE 0.3 2.6 -2.3 0.2  
SINCE DEC 1 0.3 2.6 -2.3 0.2  
SINCE JUL 1 3.0 4.6 -1.6 1.3  
SNOW DEPTH MM  
 
DEGREE DAYS  
HEATING  
YESTERDAY 32 34 -2 26  
MONTH TO DATE 311 383 -72 338  
SINCE DEC 1 311 383 -72 338  
SINCE JUL 1 1275 1534 -259 1403  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE DEC 1 0 0 0 0  
SINCE JAN 1 1145 1003 142 1174    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION W (280)  
HIGHEST GUST SPEED 23 HIGHEST GUST DIRECTION W (290)  
AVERAGE WIND SPEED 9.1  
 
SKY COVER  
AVERAGE SKY COVER 0.3  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 78 4:00 AM  
LOWEST 52 12:00 PM  
AVERAGE 65  
   
......................................................
 
 
THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 37 67 1975  
MINIMUM TEMPERATURE (F) 25 -13 1903  
 
SUNRISE AND SUNSET  
DECEMBER 13 2023......SUNRISE 7:11 AM CST SUNSET 4:20 PM CST  
DECEMBER 14 2023......SUNRISE 7:12 AM CST SUNSET 4:21 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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