301  
CDUS43 KLOT 042137  
CLIORD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE CHICAGO IL  
437 PM CDT WED SEP 04 2024  
   
...............................  
 
   
..THE CHICAGO-OHARE CLIMATE SUMMARY FOR SEPTEMBER 4 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 84 2:12 PM 95 1954 80 4 94  
1960  
1983  
MINIMUM 58 3:12 AM 45 1982 62 -4 71  
1997  
AVERAGE 71 70 1 83  
 
PRECIPITATION (IN)  
TODAY 0.00 2.95 1894 0.12 -0.12 0.00  
MONTH TO DATE 0.00 0.47 -0.47 0.00  
SINCE SEP 1 0.00 0.47 -0.47 0.00  
SINCE JAN 1 26.86 27.18 -0.32 24.26  
 
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 MM  
 
DEGREE DAYS  
HEATING  
TODAY 0 1 -1 0  
MONTH TO DATE 0 1 -1 0  
SINCE SEP 1 0 1 -1 0  
SINCE JUL 1 0 7 -7 2  
 
COOLING  
TODAY 6 6 0 18  
MONTH TO DATE 14 25 -11 54  
SINCE SEP 1 14 25 -11 54  
SINCE JAN 1 1000 897 103 988    
...............................................................  
 
WIND (MPH)  
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION SE (140)  
HIGHEST GUST SPEED 21 HIGHEST GUST DIRECTION SE (150)  
AVERAGE WIND SPEED 5.2  
 
SKY COVER  
AVERAGE SKY COVER 0.1  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 83 3:00 AM  
LOWEST 26 2:00 PM  
AVERAGE 55  
   
......................................................  
 
THE CHICAGO-OHARE CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 79 98 1899  
MINIMUM TEMPERATURE (F) 61 44 1984  
1988  
 
SUNRISE AND SUNSET  
SEPTEMBER 4 2024.....SUNRISE 6:21 AM CDT SUNSET 7:19 PM CDT  
SEPTEMBER 5 2024.....SUNRISE 6:22 AM CDT SUNSET 7:17 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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