058  
CDUS43 KLOT 212139  
CLIORD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE CHICAGO IL  
439 PM CDT SAT SEP 21 2024  
   
...............................
 
 
   
..THE CHICAGO-OHARE CLIMATE SUMMARY FOR SEPTEMBER 21 2024
 
 
VALID TODAY AS OF 0400 PM LOCAL TIME.  
 
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)  
TODAY  
MAXIMUM 92 2:04 PM 94 2017 74 18 81  
MINIMUM 63 5:48 AM 39 1889 55 8 66  
1983  
1991  
AVERAGE 78 64 14 74  
 
PRECIPITATION (IN)  
TODAY 0.00 1.67 1947 0.11 -0.11 0.05  
MONTH TO DATE 0.06 2.27 -2.21 2.85  
SINCE SEP 1 0.06 2.27 -2.21 2.85  
SINCE JAN 1 26.92 28.98 -2.06 27.11  
 
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 0.0  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 0 3 -3 0  
MONTH TO DATE 14 33 -19 13  
SINCE SEP 1 14 33 -19 13  
SINCE JUL 1 14 39 -25 15  
 
COOLING  
TODAY 13 3 10 9  
MONTH TO DATE 161 99 62 112  
SINCE SEP 1 161 99 62 112  
SINCE JAN 1 1147 971 176 1046    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION S (200)  
HIGHEST GUST SPEED 23 HIGHEST GUST DIRECTION S (200)  
AVERAGE WIND SPEED 4.3  
 
SKY COVER  
AVERAGE SKY COVER 0.2  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 75 5:00 AM  
LOWEST 24 2:00 PM  
AVERAGE 50  
   
......................................................
 
 
THE CHICAGO-OHARE CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 73 94 2017  
MINIMUM TEMPERATURE (F) 55 32 1995  
 
SUNRISE AND SUNSET  
SEPTEMBER 21 2024.....SUNRISE 6:38 AM CDT SUNSET 6:50 PM CDT  
SEPTEMBER 22 2024.....SUNRISE 6:40 AM CDT SUNSET 6:48 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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