126  
CDUS43 KLOT 092234  
CLIORD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE CHICAGO IL  
434 PM CST SAT DEC 09 2023  
   
...............................
 
 
   
..THE CHICAGO-OHARE CLIMATE SUMMARY FOR DECEMBER 9 2023
 
 
VALID TODAY AS OF 0400 PM LOCAL TIME.  
 
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)  
TODAY  
MAXIMUM 54 7:03 AM 62 1879 38 16 38  
MINIMUM 43 3:59 PM -14 1876 26 17 34  
AVERAGE 49 32 17 36  
 
PRECIPITATION (IN)  
TODAY 0.24 1.47 2008 0.08 0.16 0.46  
MONTH TO DATE 1.30 0.69 0.61 0.46  
SINCE DEC 1 1.30 0.69 0.61 0.46  
SINCE JAN 1 32.06 36.44 -4.38 30.29  
 
SNOWFALL (IN)  
TODAY 0.0 5.1 1931 0.2 -0.2 0.2  
MONTH TO DATE 0.3 1.9 -1.6 0.2  
SINCE DEC 1 0.3 1.9 -1.6 0.2  
SINCE JUL 1 3.0 3.9 -0.9 1.3  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 16 33 -17 29  
MONTH TO DATE 210 283 -73 259  
SINCE DEC 1 210 283 -73 259  
SINCE JUL 1 1174 1434 -260 1324  
 
COOLING  
TODAY 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 25 HIGHEST WIND DIRECTION SW (240)  
HIGHEST GUST SPEED 41 HIGHEST GUST DIRECTION W (260)  
AVERAGE WIND SPEED 15.4  
 
SKY COVER  
AVERAGE SKY COVER 0.8  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
RAIN  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 97 6:00 AM  
LOWEST 60 3:00 PM  
AVERAGE 79  
   
......................................................
 
 
THE CHICAGO-OHARE CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 38 62 1879  
MINIMUM TEMPERATURE (F) 26 -8 1919  
1978  
 
SUNRISE AND SUNSET  
DECEMBER 9 2023......SUNRISE 7:08 AM CST SUNSET 4:20 PM CST  
DECEMBER 10 2023......SUNRISE 7:08 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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