193  
CDUS43 KLOT 120632  
CLIORD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE CHICAGO IL  
1232 AM CST TUE DEC 12 2023  
   
...............................  
 
   
..THE CHICAGO-OHARE CLIMATE SUMMARY FOR DECEMBER 11 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 36 10:58 PM 61 1949 38 -2 40  
MINIMUM 28 8:50 AM -5 1972 26 2 36  
AVERAGE 32 32 0 38  
 
PRECIPITATION (IN)  
YESTERDAY T 1.73 1949 0.07 -0.07 T  
MONTH TO DATE 1.30 0.83 0.47 0.48  
SINCE DEC 1 1.30 0.83 0.47 0.48  
SINCE JAN 1 32.06 36.58 -4.52 30.31  
 
SNOWFALL (IN)  
YESTERDAY T 9.5 2000 0.2 -0.2 0.0  
MONTH TO DATE 0.3 2.4 -2.1 0.2  
SINCE DEC 1 0.3 2.4 -2.1 0.2  
SINCE JUL 1 3.0 4.4 -1.4 1.3  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 33 33 0 27  
MONTH TO DATE 279 349 -70 312  
SINCE DEC 1 279 349 -70 312  
SINCE JUL 1 1243 1500 -257 1377  
 
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 15 HIGHEST WIND DIRECTION S (200)  
HIGHEST GUST SPEED 21 HIGHEST GUST DIRECTION S (200)  
AVERAGE WIND SPEED 7.2  
 
SKY COVER  
AVERAGE SKY COVER 0.6  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
HAIL  
LIGHT SNOW  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 78 12:00 AM  
LOWEST 63 1:00 PM  
AVERAGE 71  
   
......................................................  
 
THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 37 61 1877  
MINIMUM TEMPERATURE (F) 25 -8 2000  
 
SUNRISE AND SUNSET  
DECEMBER 12 2023......SUNRISE 7:10 AM CST SUNSET 4:20 PM CST  
DECEMBER 13 2023......SUNRISE 7:11 AM CST SUNSET 4:20 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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