252  
CDUS43 KLOT 300659  
CLIORD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE CHICAGO IL  
159 AM CDT MON SEP 30 2024  
   
...............................  
 
   
..THE CHICAGO-OHARE CLIMATE SUMMARY FOR SEPTEMBER 29 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 74 3:58 PM 99 1953 70 4 77  
MINIMUM 66 8:29 PM 32 1984 52 14 59  
AVERAGE 70 61 9 68  
 
PRECIPITATION (IN)  
YESTERDAY 0.01 1.39 1921 0.09 -0.08 0.00  
MONTH TO DATE 1.32 3.09 -1.77 3.36  
SINCE SEP 1 1.32 3.09 -1.77 3.36  
SINCE JAN 1 28.18 29.80 -1.62 27.62  
 
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 6 -6 0  
MONTH TO DATE 15 70 -55 13  
SINCE SEP 1 15 70 -55 13  
SINCE JUL 1 15 76 -61 15  
 
COOLING  
YESTERDAY 5 2 3 3  
MONTH TO DATE 184 116 68 147  
SINCE SEP 1 184 116 68 147  
SINCE JAN 1 1170 988 182 1081    
...............................................................  
 
WIND (MPH)  
HIGHEST WIND SPEED 22 HIGHEST WIND DIRECTION NE (40)  
HIGHEST GUST SPEED 26 HIGHEST GUST DIRECTION NE (40)  
AVERAGE WIND SPEED 13.2  
 
SKY COVER  
AVERAGE SKY COVER 0.9  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT RAIN  
FOG  
HAZE  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 90 10:00 AM  
LOWEST 66 5:00 PM  
AVERAGE 78  
   
......................................................  
 
THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 70 92 1971  
MINIMUM TEMPERATURE (F) 51 29 1984  
 
SUNRISE AND SUNSET  
SEPTEMBER 30 2024.....SUNRISE 6:48 AM CDT SUNSET 6:34 PM CDT  
OCTOBER 1 2024.......SUNRISE 6:49 AM CDT SUNSET 6:32 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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