050  
CDUS43 KLOT 312239  
CLIORD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE CHICAGO IL  
439 PM CST TUE DEC 31 2024  
   
...............................  
 
   
..THE CHICAGO-OHARE CLIMATE SUMMARY FOR DECEMBER 31 2024  
 
VALID TODAY AS OF 0400 PM LOCAL TIME.  
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1871 TO 2024  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................  
 
TEMPERATURE (F)  
TODAY  
MAXIMUM 42 12:23 AM 68 1875 33 9 36  
MINIMUM 36 8:57 AM -10 1967 21 15 31  
AVERAGE 39 27 12 34  
 
PRECIPITATION (IN)  
TODAY 0.57 0.89 1978 0.07 0.50 0.08  
MONTH TO DATE 1.93 2.11 -0.18 2.97  
SINCE DEC 1 1.93 2.11 -0.18 2.97  
SINCE JAN 1 34.92 37.86 -2.94 33.73  
 
SNOWFALL (IN)  
TODAY 0.0 7.6 1978 0.3 -0.3 0.9  
MONTH TO DATE 2.4 7.6 -5.2 1.2  
SINCE DEC 1 2.4 7.6 -5.2 1.2  
SINCE JUL 1 5.3 9.6 -4.3 3.9  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 26 38 -12 31  
MONTH TO DATE 1012 1069 -57 798  
SINCE DEC 1 1012 1069 -57 798  
SINCE JUL 1 1779 2220 -441 1762  
 
COOLING  
TODAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE DEC 1 0 0 0 0  
SINCE JAN 1 1212 1003 209 1145    
...............................................................  
 
WIND (MPH)  
HIGHEST WIND SPEED 26 HIGHEST WIND DIRECTION NE (40)  
HIGHEST GUST SPEED 35 HIGHEST GUST DIRECTION NE (50)  
AVERAGE WIND SPEED 16.3  
 
SKY COVER  
AVERAGE SKY COVER 1.0  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
RAIN  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 93 3:00 AM  
LOWEST 82 12:00 AM  
AVERAGE 88  
   
......................................................  
 
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 2024......SUNRISE 7:20 AM CST SUNSET 4:30 PM CST  
JANUARY 1 2025.......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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