562  
CDUS43 KLOT 310636  
CLIMDW  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE CHICAGO IL  
136 AM CDT THU JUL 31 2025  
   
...............................  
 
   
..THE CHICAGO-MIDWAY CLIMATE SUMMARY FOR JULY 30 2025  
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1928 TO 2025  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................  
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 82 10:34 AM 104 1999 84 -2 92  
MINIMUM 70 11:59 PM 51 1936 68 2 71  
AVERAGE 76 76 0 82  
 
PRECIPITATION (IN)  
YESTERDAY 0.53 2.43 1979 0.12 0.41 0.00  
MONTH TO DATE 6.58 3.43 3.15 6.31  
SINCE JUN 1 11.95 7.44 4.51 9.75  
SINCE JAN 1 21.52 19.92 1.60 25.73  
 
DEGREE DAYS  
HEATING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE JUN 1 9 24 -15 3  
SINCE JUL 1 0 0 0 0  
 
COOLING  
YESTERDAY 11 11 0 17  
MONTH TO DATE 435 345 90 334  
SINCE JUN 1 759 567 192 656  
SINCE JAN 1 810 649 161 769    
...............................................................  
 
WIND (MPH)  
HIGHEST WIND SPEED 23 HIGHEST WIND DIRECTION NE (60)  
HIGHEST GUST SPEED 32 HIGHEST GUST DIRECTION NE (60)  
AVERAGE WIND SPEED 11.0  
 
SKY COVER  
AVERAGE SKY COVER 1.0  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
THUNDERSTORM  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 90 9:00 PM  
LOWEST 65 2:00 AM  
AVERAGE 78  
   
......................................................  
 
THE CHICAGO-MIDWAY CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 84 99 1945  
2006  
MINIMUM TEMPERATURE (F) 68 50 1936  
 
SUNRISE AND SUNSET  
JULY 31 2025..........SUNRISE 5:44 AM CDT SUNSET 8:10 PM CDT  
AUGUST 1 2025........SUNRISE 5:45 AM CDT SUNSET 8:09 PM CDT  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 
 
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