477  
CDUS43 KLOT 170633  
CLIORD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE CHICAGO IL  
133 AM CDT TUE SEP 17 2024  
   
...............................  
 
   
..THE CHICAGO-OHARE CLIMATE SUMMARY FOR SEPTEMBER 16 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 90 1:48 PM 92 1931 76 14 70  
1955  
MINIMUM 65 5:45 AM 37 1984 57 8 60  
AVERAGE 78 66 12 65  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.16 1980 0.10 -0.10 0.03  
MONTH TO DATE 0.04 1.73 -1.69 0.92  
SINCE SEP 1 0.04 1.73 -1.69 0.92  
SINCE JAN 1 26.90 28.44 -1.54 25.18  
 
SNOWFALL (IN)  
YESTERDAY 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  
YESTERDAY 0 2 -2 0  
MONTH TO DATE 14 18 -4 5  
SINCE SEP 1 14 18 -4 5  
SINCE JUL 1 14 24 -10 7  
 
COOLING  
YESTERDAY 13 4 9 0  
MONTH TO DATE 103 83 20 96  
SINCE SEP 1 103 83 20 96  
SINCE JAN 1 1089 955 134 1030    
...............................................................  
 
WIND (MPH)  
HIGHEST WIND SPEED 17 HIGHEST WIND DIRECTION E (100)  
HIGHEST GUST SPEED 26 HIGHEST GUST DIRECTION E (110)  
AVERAGE WIND SPEED 5.9  
 
SKY COVER  
AVERAGE SKY COVER 0.6  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 84 12:00 AM  
LOWEST 23 2:00 PM  
AVERAGE 54  
   
......................................................  
 
THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 75 93 1955  
MINIMUM TEMPERATURE (F) 57 37 1984  
 
SUNRISE AND SUNSET  
SEPTEMBER 17 2024.....SUNRISE 6:34 AM CDT SUNSET 6:57 PM CDT  
SEPTEMBER 18 2024.....SUNRISE 6:35 AM CDT SUNSET 6:55 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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