487  
CDUS43 KLOT 252138  
CLIORD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE CHICAGO IL  
438 PM CDT MON OCT 25 2021  
   
...............................
 
 
   
..THE CHICAGO-OHARE CLIMATE SUMMARY FOR OCTOBER 25 2021
 
 
VALID TODAY AS OF 0400 PM LOCAL TIME.  
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1871 TO 2021  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
TODAY  
MAXIMUM 55 2:21 PM 79 1963 59 -4 47  
MINIMUM 49 8:14 AM 14 1887 42 7 39  
AVERAGE 52 50 2 43  
 
PRECIPITATION (IN)  
TODAY 0.76 1.94 1883 0.11 0.65 T  
MONTH TO DATE 4.76 2.79 1.97 3.56  
SINCE SEP 1 5.99 5.98 0.01 6.74  
SINCE JAN 1 26.13 32.69 -6.56 34.86  
 
SNOWFALL (IN)  
TODAY 0.0 0.3 1962 0.0 0.0 0.0  
MONTH TO DATE 0.0 0.1 -0.1 0.0  
SINCE SEP 1 0.0 0.1 -0.1 0.0  
SINCE JUL 1 0.0 0.1 -0.1 0.0  
 
DEGREE DAYS  
HEATING  
TODAY 13 15 -2 22  
MONTH TO DATE 127 260 -133 263  
SINCE SEP 1 143 337 -194 321  
SINCE JUL 1 143 343 -200 321  
 
COOLING  
TODAY 0 0 0 0  
MONTH TO DATE 59 12 47 4  
SINCE SEP 1 242 128 114 108  
SINCE JAN 1 1316 1000 316 1290    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 33 HIGHEST WIND DIRECTION NE (30)  
HIGHEST GUST SPEED 46 HIGHEST GUST DIRECTION NE (50)  
AVERAGE WIND SPEED 23.6  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 1.0  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
THUNDERSTORM  
HEAVY RAIN  
RAIN  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 93 6:00 AM  
LOWEST 66 2:00 PM  
AVERAGE 80  
   
......................................................
 
 
THE CHICAGO-OHARE CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 58 84 1963  
MINIMUM TEMPERATURE (F) 42 22 1887  
1942  
 
SUNRISE AND SUNSET  
OCTOBER 25 2021.......SUNRISE 7:16 AM CDT SUNSET 5:55 PM CDT  
OCTOBER 26 2021.......SUNRISE 7:17 AM CDT SUNSET 5:53 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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