825  
CDUS43 KLOT 180632  
CLIORD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE CHICAGO IL  
132 AM CDT WED SEP 18 2024  
   
...............................  
 
   
..THE CHICAGO-OHARE CLIMATE SUMMARY FOR SEPTEMBER 17 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 85 2:05 PM 93 1955 75 10 64  
MINIMUM 62 5:49 AM 37 1984 57 5 57  
AVERAGE 74 66 8 61  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 2.42 1927 0.11 -0.11 1.60  
MONTH TO DATE 0.04 1.84 -1.80 2.52  
SINCE SEP 1 0.04 1.84 -1.80 2.52  
SINCE JAN 1 26.90 28.55 -1.65 26.78  
 
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 3 -3 4  
MONTH TO DATE 14 21 -7 9  
SINCE SEP 1 14 21 -7 9  
SINCE JUL 1 14 27 -13 11  
 
COOLING  
YESTERDAY 9 4 5 0  
MONTH TO DATE 112 87 25 96  
SINCE SEP 1 112 87 25 96  
SINCE JAN 1 1098 959 139 1030    
...............................................................  
 
WIND (MPH)  
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION NE (60)  
HIGHEST GUST SPEED 22 HIGHEST GUST DIRECTION E (70)  
AVERAGE WIND SPEED 4.9  
 
SKY COVER  
AVERAGE SKY COVER 0.1  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 87 11:00 PM  
LOWEST 29 4:00 PM  
AVERAGE 58  
   
......................................................  
 
THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 75 94 1955  
MINIMUM TEMPERATURE (F) 56 40 1889  
1901  
1903  
 
SUNRISE AND SUNSET  
SEPTEMBER 18 2024.....SUNRISE 6:35 AM CDT SUNSET 6:55 PM CDT  
SEPTEMBER 19 2024.....SUNRISE 6:36 AM CDT SUNSET 6:53 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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