388  
CDUS43 KLOT 180636  
CLIORD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE CHICAGO IL  
1236 AM CST SAT JAN 18 2025  
   
...............................  
 
   
..THE CHICAGO-OHARE CLIMATE SUMMARY FOR JANUARY 17 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 47 3:32 PM 60 1894 31 16 20  
MINIMUM 26 5:25 AM -23 1982 18 8 2  
AVERAGE 37 25 12 11  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 0.70 1910 0.07 -0.07 0.00  
MONTH TO DATE 0.20 1.15 -0.95 2.12  
SINCE DEC 1 2.13 3.26 -1.13 5.09  
SINCE JAN 1 0.20 1.15 -0.95 2.12  
 
SNOWFALL (IN)  
YESTERDAY 0.0 4.9 1970 0.4 -0.4 0.0  
MONTH TO DATE 3.9 5.7 -1.8 14.2  
SINCE DEC 1 6.3 13.3 -7.0 15.4  
SINCE JUL 1 9.2 15.3 -6.1 18.1  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 28 40 -12 54  
MONTH TO DATE 714 668 46 696  
SINCE DEC 1 1727 1737 -10 1494  
SINCE JUL 1 2494 2888 -394 2458  
 
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 30 HIGHEST WIND DIRECTION S (200)  
HIGHEST GUST SPEED 44 HIGHEST GUST DIRECTION S (190)  
AVERAGE WIND SPEED 13.2  
 
SKY COVER  
AVERAGE SKY COVER 0.5  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 81 5:00 AM  
LOWEST 49 1:00 PM  
AVERAGE 65  
   
......................................................  
 
THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 31 61 1996  
MINIMUM TEMPERATURE (F) 18 -21 1994  
 
SUNRISE AND SUNSET  
JANUARY 18 2025.......SUNRISE 7:15 AM CST SUNSET 4:49 PM CST  
JANUARY 19 2025.......SUNRISE 7:15 AM CST SUNSET 4:51 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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