335  
CDUS43 KLOT 312236  
CLIORD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE CHICAGO IL  
436 PM CST SUN DEC 31 2023  
   
...............................
 
 
   
..THE CHICAGO-OHARE CLIMATE SUMMARY FOR DECEMBER 31 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 36 1:20 AM 68 1875 33 3 39  
MINIMUM 31 9:29 AM -10 1967 21 10 26  
AVERAGE 34 27 7 33  
 
PRECIPITATION (IN)  
TODAY 0.08 0.89 1978 0.07 0.01 0.00  
MONTH TO DATE 2.97 2.11 0.86 2.16  
SINCE DEC 1 2.97 2.11 0.86 2.16  
SINCE JAN 1 33.73 37.86 -4.13 31.99  
 
SNOWFALL (IN)  
TODAY 0.9 7.6 1978 0.3 0.6 0.0  
MONTH TO DATE 1.2 7.6 -6.4 3.2  
SINCE DEC 1 1.2 7.6 -6.4 3.2  
SINCE JUL 1 3.9 9.6 -5.7 4.3  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 31 38 -7 32  
MONTH TO DATE 798 1069 -271 1101  
SINCE DEC 1 798 1069 -271 1101  
SINCE JUL 1 1762 2220 -458 2166  
 
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 15 HIGHEST WIND DIRECTION W (250)  
HIGHEST GUST SPEED 21 HIGHEST GUST DIRECTION W (250)  
AVERAGE WIND SPEED 7.9  
 
SKY COVER  
AVERAGE SKY COVER 1.0  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
LIGHT RAIN  
LT FREEZING RAIN  
LIGHT SNOW  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 96 8:00 AM  
LOWEST 72 2:00 AM  
AVERAGE 84  
   
......................................................
 
 
THE CHICAGO-OHARE CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 33 65 1876  
MINIMUM TEMPERATURE (F) 21 -10 1969  
 
SUNRISE AND SUNSET  
DECEMBER 31 2023......SUNRISE 7:19 AM CST SUNSET 4:30 PM CST  
JANUARY 1 2024.......SUNRISE 7:20 AM CST SUNSET 4:31 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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