826  
CDUS43 KLOT 202133  
CLIORD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE CHICAGO IL  
433 PM CDT WED SEP 20 2023  
   
...............................
 
 
   
..THE CHICAGO-OHARE CLIMATE SUMMARY FOR SEPTEMBER 20 2023
 
 
VALID TODAY AS OF 0400 PM LOCAL TIME.  
 
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)  
TODAY  
MAXIMUM 79 2:59 PM 93 2018 74 5 86  
MINIMUM 63 4:29 AM 36 1991 55 8 63  
AVERAGE 71 65 6 75  
 
PRECIPITATION (IN)  
TODAY 0.01 1.33 2001 0.11 -0.10 0.16  
MONTH TO DATE 2.80 2.16 0.64 2.08  
SINCE SEP 1 2.80 2.16 0.64 2.08  
SINCE JAN 1 27.06 28.87 -1.81 27.19  
 
SNOWFALL (IN)  
TODAY 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  
TODAY 0 3 -3 0  
MONTH TO DATE 13 30 -17 4  
SINCE SEP 1 13 30 -17 4  
SINCE JUL 1 15 36 -21 4  
 
COOLING  
TODAY 6 3 3 10  
MONTH TO DATE 102 96 6 146  
SINCE SEP 1 102 96 6 146  
SINCE JAN 1 1036 968 68 1147    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION S (180)  
HIGHEST GUST SPEED 21 HIGHEST GUST DIRECTION S (180)  
AVERAGE WIND SPEED 8.5  
 
SKY COVER  
AVERAGE SKY COVER 0.8  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
LIGHT RAIN  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 75 6:00 AM  
LOWEST 52 11:00 AM  
AVERAGE 64  
   
......................................................
 
 
THE CHICAGO-OHARE CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 74 94 2017  
MINIMUM TEMPERATURE (F) 55 39 1889  
1983  
1991  
 
SUNRISE AND SUNSET  
SEPTEMBER 20 2023.....SUNRISE 6:37 AM CDT SUNSET 6:53 PM CDT  
SEPTEMBER 21 2023.....SUNRISE 6:38 AM CDT SUNSET 6:51 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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