839  
CDUS43 KLOT 010652  
CLIORD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE CHICAGO IL  
152 AM CDT TUE OCT 01 2024  
   
...............................
 
 
   
..THE CHICAGO-OHARE CLIMATE SUMMARY FOR SEPTEMBER 30 2024
 
 
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)  
YESTERDAY  
MAXIMUM 79 1:26 PM 92 1971 70 9 84  
MINIMUM 63 5:37 AM 29 1984 51 12 61  
AVERAGE 71 60 11 73  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.27 1896 0.10 -0.10 0.00  
MONTH TO DATE 1.32 3.19 -1.87 3.36  
SINCE SEP 1 1.32 3.19 -1.87 3.36  
SINCE JAN 1 28.18 29.90 -1.72 27.62  
 
SNOWFALL (IN)  
YESTERDAY 0.0 T 2006 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  
YESTERDAY 0 6 -6 0  
MONTH TO DATE 15 76 -61 13  
SINCE SEP 1 15 76 -61 13  
SINCE JUL 1 15 82 -67 15  
 
COOLING  
YESTERDAY 6 2 4 8  
MONTH TO DATE 190 116 74 155  
SINCE SEP 1 190 116 74 155  
SINCE JAN 1 1176 988 188 1089    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION E (70)  
HIGHEST GUST SPEED 15 HIGHEST GUST DIRECTION N (20)  
AVERAGE WIND SPEED 6.0  
 
SKY COVER  
AVERAGE SKY COVER 0.4  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 90 11:00 PM  
LOWEST 60 1:00 PM  
AVERAGE 75  
   
......................................................
 
 
THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 69 92 1971  
MINIMUM TEMPERATURE (F) 51 32 1886  
1974  
 
SUNRISE AND SUNSET  
OCTOBER 1 2024.......SUNRISE 6:49 AM CDT SUNSET 6:32 PM CDT  
OCTOBER 2 2024.......SUNRISE 6:50 AM CDT SUNSET 6:31 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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