059  
CDUS43 KLOT 152236  
CLIORD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE CHICAGO IL  
436 PM CST SUN DEC 15 2024  
   
...............................
 
 
   
..THE CHICAGO-OHARE CLIMATE SUMMARY FOR DECEMBER 15 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 45 2:24 PM 66 2021 37 8 53  
MINIMUM 38 1:40 AM -12 1901 25 13 35  
AVERAGE 42 30 12 44  
 
PRECIPITATION (IN)  
TODAY 0.05 1.10 1971 0.06 -0.01 0.00  
MONTH TO DATE 0.38 1.09 -0.71 1.30  
SINCE DEC 1 0.38 1.09 -0.71 1.30  
SINCE JAN 1 33.37 36.84 -3.47 32.06  
 
SNOWFALL (IN)  
TODAY 0.0 8.0 1987 0.2 -0.2 0.0  
MONTH TO DATE 0.2 3.3 -3.1 0.3  
SINCE DEC 1 0.2 3.3 -3.1 0.3  
SINCE JUL 1 3.1 5.3 -2.2 3.0  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 23 34 -11 21  
MONTH TO DATE 546 485 61 388  
SINCE DEC 1 546 485 61 388  
SINCE JUL 1 1313 1636 -323 1352  
 
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 12 HIGHEST WIND DIRECTION E (110)  
HIGHEST GUST SPEED 16 HIGHEST GUST DIRECTION SE (120)  
AVERAGE WIND SPEED 5.1  
 
SKY COVER  
AVERAGE SKY COVER 1.0  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
LIGHT RAIN  
FOG  
FOG W/VISIBILITY <= 1/4 MILE  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 3:00 AM  
LOWEST 92 12:00 AM  
AVERAGE 96  
   
......................................................
 
 
THE CHICAGO-OHARE CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 36 66 2021  
MINIMUM TEMPERATURE (F) 24 -12 1951  
 
SUNRISE AND SUNSET  
DECEMBER 15 2024......SUNRISE 7:13 AM CST SUNSET 4:21 PM CST  
DECEMBER 16 2024......SUNRISE 7:14 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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