456  
CDUS43 KLOT 170632  
CLIORD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE CHICAGO IL  
132 AM CDT FRI OCT 17 2025  
   
...............................
 
 
   
..THE CHICAGO-OHARE CLIMATE SUMMARY FOR OCTOBER 16 2025
 
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1871 TO 2025  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 69 1:23 PM 87 1963 63 6 58  
MINIMUM 56 6:34 AM 28 1991 45 11 37  
AVERAGE 63 54 9 48  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.41 1878 0.11 -0.11 0.00  
MONTH TO DATE 1.55 1.80 -0.25 0.30  
SINCE SEP 1 2.04 4.99 -2.95 1.62  
SINCE JAN 1 24.49 31.70 -7.21 28.48  
 
SNOWFALL (IN)  
YESTERDAY 0.0 T 1943 0.0 0.0 0.0  
2009  
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 2 11 -9 17  
MONTH TO DATE 59 141 -82 84  
SINCE SEP 1 91 218 -127 99  
SINCE JUL 1 96 224 -128 99  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 55 12 43 13  
SINCE SEP 1 221 128 93 203  
SINCE JAN 1 1213 1000 213 1189    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION SE (120)  
HIGHEST GUST SPEED 18 HIGHEST GUST DIRECTION E (110)  
AVERAGE WIND SPEED 6.8  
 
SKY COVER  
AVERAGE SKY COVER 0.5  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 75 6:00 AM  
LOWEST 45 1:00 PM  
AVERAGE 60  
   
......................................................
 
 
THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 62 86 1950  
MINIMUM TEMPERATURE (F) 45 26 1948  
 
SUNRISE AND SUNSET  
OCTOBER 17 2025.......SUNRISE 7:07 AM CDT SUNSET 6:06 PM CDT  
OCTOBER 18 2025.......SUNRISE 7:08 AM CDT SUNSET 6:05 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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