476  
CDUS43 KLOT 210633  
CLIORD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE CHICAGO IL  
1233 AM CST TUE JAN 21 2025  
   
...............................  
 
   
..THE CHICAGO-OHARE CLIMATE SUMMARY FOR JANUARY 20 2025  
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1871 TO 2025  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................  
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 11 3:44 PM 63 1906 31 -20 18  
MINIMUM -2 7:40 AM -27 1985 18 -20 4  
AVERAGE 5 25 -20 11  
 
PRECIPITATION (IN)  
YESTERDAY T 1.13 1898 0.06 -0.06 0.00  
MONTH TO DATE 0.20 1.34 -1.14 2.22  
SINCE DEC 1 2.13 3.45 -1.32 5.19  
SINCE JAN 1 0.20 1.34 -1.14 2.22  
 
SNOWFALL (IN)  
YESTERDAY T 8.0 1886 0.4 -0.4 0.0  
MONTH TO DATE 3.9 6.9 -3.0 16.1  
SINCE DEC 1 6.3 14.5 -8.2 17.3  
SINCE JUL 1 9.2 16.5 -7.3 20.0  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 60 40 20 54  
MONTH TO DATE 869 788 81 850  
SINCE DEC 1 1882 1857 25 1648  
SINCE JUL 1 2649 3008 -359 2612  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE DEC 1 0 0 0 0  
SINCE JAN 1 0 0 0 0    
...............................................................  
 
WIND (MPH)  
HIGHEST WIND SPEED 24 HIGHEST WIND DIRECTION SW (240)  
HIGHEST GUST SPEED 39 HIGHEST GUST DIRECTION W (250)  
AVERAGE WIND SPEED 11.8  
 
SKY COVER  
AVERAGE SKY COVER 0.3  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT SNOW  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 62 6:00 AM  
LOWEST 34 3:00 PM  
AVERAGE 48  
   
......................................................  
 
THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 31 62 1906  
MINIMUM TEMPERATURE (F) 18 -22 1984  
 
SUNRISE AND SUNSET  
JANUARY 21 2025.......SUNRISE 7:13 AM CST SUNSET 4:53 PM CST  
JANUARY 22 2025.......SUNRISE 7:13 AM CST SUNSET 4:54 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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