566  
CDUS43 KLOT 202137  
CLIORD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE CHICAGO IL  
437 PM CDT FRI SEP 20 2024  
   
...............................
 
 
   
..THE CHICAGO-OHARE CLIMATE SUMMARY FOR SEPTEMBER 20 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 91 2:10 PM 93 2018 74 17 80  
MINIMUM 70 6:30 AM 36 1991 55 15 63  
AVERAGE 81 65 16 72  
 
PRECIPITATION (IN)  
TODAY 0.02 1.33 2001 0.11 -0.09 0.01  
MONTH TO DATE 0.06 2.16 -2.10 2.80  
SINCE SEP 1 0.06 2.16 -2.10 2.80  
SINCE JAN 1 26.92 28.87 -1.95 27.06  
 
SNOWFALL (IN)  
TODAY 0.0 0.0 MM 0.0 0.0 0.0  
MONTH TO DATE 0.0 0.0 0.0 0.0  
SINCE SEP 1 0.0 0.0 0.0 0.0  
SINCE JUL 1 0.0 0.0 0.0 0.0  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 0 3 -3 0  
MONTH TO DATE 14 30 -16 13  
SINCE SEP 1 14 30 -16 13  
SINCE JUL 1 14 36 -22 15  
 
COOLING  
TODAY 16 3 13 7  
MONTH TO DATE 149 96 53 103  
SINCE SEP 1 149 96 53 103  
SINCE JAN 1 1135 968 167 1037    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION SW (230)  
HIGHEST GUST SPEED 23 HIGHEST GUST DIRECTION SW (210)  
AVERAGE WIND SPEED 9.5  
 
SKY COVER  
AVERAGE SKY COVER 0.6  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
THUNDERSTORM  
LIGHT RAIN  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 76 5:00 AM  
LOWEST 29 3:00 PM  
AVERAGE 53  
   
......................................................
 
 
THE CHICAGO-OHARE CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 74 94 2017  
MINIMUM TEMPERATURE (F) 55 39 1889  
1983  
1991  
 
SUNRISE AND SUNSET  
SEPTEMBER 20 2024.....SUNRISE 6:37 AM CDT SUNSET 6:51 PM CDT  
SEPTEMBER 21 2024.....SUNRISE 6:38 AM CDT SUNSET 6:50 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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