230  
CDUS43 KLOT 100632  
CLIORD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE CHICAGO IL  
132 AM CDT SUN SEP 10 2023  
   
...............................
 
 
   
..THE CHICAGO-OHARE CLIMATE SUMMARY FOR SEPTEMBER 9 2023
 
 
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)  
YESTERDAY  
MAXIMUM 76 12:55 PM 95 1955 78 -2 84  
1959  
1983  
MINIMUM 56 4:02 AM 43 1986 60 -4 62  
AVERAGE 66 69 -3 73  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 3.44 1875 0.10 -0.10 0.00  
MONTH TO DATE 0.11 1.02 -0.91 T  
SINCE SEP 1 0.11 1.02 -0.91 T  
SINCE JAN 1 24.37 27.73 -3.36 25.11  
 
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 T  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 0 1 -1 0  
MONTH TO DATE 2 6 -4 0  
SINCE SEP 1 2 6 -4 0  
SINCE JUL 1 4 12 -8 0  
 
COOLING  
YESTERDAY 1 5 -4 8  
MONTH TO DATE 89 53 36 76  
SINCE SEP 1 89 53 36 76  
SINCE JAN 1 1023 925 98 1077    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION NE (40)  
HIGHEST GUST SPEED 20 HIGHEST GUST DIRECTION NE (50)  
AVERAGE WIND SPEED 7.4  
 
SKY COVER  
AVERAGE SKY COVER 0.3  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 90 12:00 AM  
LOWEST 38 1:00 PM  
AVERAGE 64  
   
......................................................
 
 
THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 78 95 1983  
2013  
MINIMUM TEMPERATURE (F) 59 44 1943  
 
SUNRISE AND SUNSET  
SEPTEMBER 10 2023.....SUNRISE 6:26 AM CDT SUNSET 7:10 PM CDT  
SEPTEMBER 11 2023.....SUNRISE 6:27 AM CDT SUNSET 7:08 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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