537  
CDUS43 KLOT 242134  
CLIORD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE CHICAGO IL  
434 PM CDT SUN SEP 24 2023  
   
...............................
 
 
   
..THE CHICAGO-OHARE CLIMATE SUMMARY FOR SEPTEMBER 24 2023
 
 
VALID TODAY AS OF 0400 PM LOCAL TIME.  
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1871 TO 2023  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
TODAY  
MAXIMUM 79 1:37 PM 93 2017 72 7 71  
MINIMUM 59 4:37 AM 35 1942 54 5 52  
1985  
1989  
AVERAGE 69 63 6 62  
 
PRECIPITATION (IN)  
TODAY 0.00 1.85 1977 0.11 -0.11 0.09  
MONTH TO DATE 2.86 2.59 0.27 2.17  
SINCE SEP 1 2.86 2.59 0.27 2.17  
SINCE JAN 1 27.12 29.30 -2.18 27.28  
 
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 T  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 0 4 -4 3  
MONTH TO DATE 13 45 -32 23  
SINCE SEP 1 13 45 -32 23  
SINCE JUL 1 15 51 -36 23  
 
COOLING  
TODAY 4 2 2 0  
MONTH TO DATE 132 106 26 154  
SINCE SEP 1 132 106 26 154  
SINCE JAN 1 1066 978 88 1155    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION E (110)  
HIGHEST GUST SPEED 23 HIGHEST GUST DIRECTION SE (140)  
AVERAGE WIND SPEED 8.0  
 
SKY COVER  
AVERAGE SKY COVER 0.6  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 78 6:00 AM  
LOWEST 45 2:00 PM  
AVERAGE 62  
   
......................................................
 
 
THE CHICAGO-OHARE CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 72 92 2017  
MINIMUM TEMPERATURE (F) 53 30 1942  
 
SUNRISE AND SUNSET  
SEPTEMBER 24 2023.....SUNRISE 6:41 AM CDT SUNSET 6:46 PM CDT  
SEPTEMBER 25 2023.....SUNRISE 6:42 AM CDT SUNSET 6:44 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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