672  
CDUS43 KLOT 220633  
CLIORD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE CHICAGO IL  
133 AM CDT FRI SEP 22 2023  
   
...............................
 
 
   
..THE CHICAGO-OHARE CLIMATE SUMMARY FOR SEPTEMBER 21 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 81 11:42 AM 94 2017 74 7 85  
MINIMUM 66 6:01 AM 39 1889 55 11 60  
1983  
1991  
AVERAGE 74 64 10 73  
 
PRECIPITATION (IN)  
YESTERDAY 0.05 1.67 1947 0.11 -0.06 0.00  
MONTH TO DATE 2.85 2.27 0.58 2.08  
SINCE SEP 1 2.85 2.27 0.58 2.08  
SINCE JAN 1 27.11 28.98 -1.87 27.19  
 
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 3 -3 0  
MONTH TO DATE 13 33 -20 4  
SINCE SEP 1 13 33 -20 4  
SINCE JUL 1 15 39 -24 4  
 
COOLING  
YESTERDAY 9 3 6 8  
MONTH TO DATE 112 99 13 154  
SINCE SEP 1 112 99 13 154  
SINCE JAN 1 1046 971 75 1155    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION S (160)  
HIGHEST GUST SPEED 19 HIGHEST GUST DIRECTION E (110)  
AVERAGE WIND SPEED 4.1  
 
SKY COVER  
AVERAGE SKY COVER 1.0  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT RAIN  
HAZE  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 87 9:00 PM  
LOWEST 50 12:00 PM  
AVERAGE 69  
   
......................................................
 
 
THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 73 94 2017  
MINIMUM TEMPERATURE (F) 55 32 1995  
 
SUNRISE AND SUNSET  
SEPTEMBER 22 2023.....SUNRISE 6:39 AM CDT SUNSET 6:49 PM CDT  
SEPTEMBER 23 2023.....SUNRISE 6:40 AM CDT SUNSET 6:47 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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