340  
CDUS43 KLOT 202140  
CLIORD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE CHICAGO IL  
440 PM CDT SAT OCT 20 2018  
 
   
...............................
 
 
   
..THE CHICAGO-OHARE IL CLIMATE SUMMARY FOR OCTOBER 20 2018
 
 
VALID TODAY AS OF 0400 PM LOCAL TIME.  
 
CLIMATE NORMAL PERIOD 1981 TO 2010  
CLIMATE RECORD PERIOD 1871 TO 2018  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
..............................................................
 
 
TEMPERATURE (F)  
TODAY  
MAXIMUM 51 1102 AM 86 1953 61 -10 78  
MINIMUM 38 1252 PM 24 1930 42 -4 51  
1895  
AVERAGE 45 51 -6 65  
 
PRECIPITATION (IN)  
TODAY T 1.65 1916 0.10 -0.10 0.00  
MONTH TO DATE 4.20 2.00 2.20 6.73  
SINCE SEP 1 7.85 5.21 2.64 7.05  
SINCE JAN 1 42.08 30.34 11.74 38.79  
 
SNOWFALL (IN)  
TODAY T 3.0 1952 0.0 0.0 0.0  
MONTH TO DATE T 0.1 -0.1 0.0  
SINCE SEP 1 T 0.1 -0.1 0.0  
SINCE JUL 1 T 0.1 -0.1 T  
 
DEGREE DAYS  
HEATING  
TODAY 20 14 6 0  
MONTH TO DATE 215 221 -6 58  
SINCE SEP 1 271 326 -55 95  
SINCE JUL 1 271 339 -68 100  
 
COOLING  
TODAY 0 0 0 0  
MONTH TO DATE 31 10 21 25  
SINCE SEP 1 213 102 111 204  
SINCE JAN 1 1290 842 448 987    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 35 HIGHEST WIND DIRECTION NW (320)  
HIGHEST GUST SPEED 60 HIGHEST GUST DIRECTION NW (310)  
AVERAGE WIND SPEED 13.8  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.3  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
LIGHT SNOW  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 86 1200 AM  
LOWEST 44 1100 AM  
AVERAGE 65  
   
......................................................
 
 
 
THE CHICAGO-OHARE IL CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 60 87 1953  
MINIMUM TEMPERATURE (F) 41 26 1952  
 
 
SUNRISE AND SUNSET  
OCTOBER 20 2018.......SUNRISE 710 AM CDT SUNSET 602 PM CDT  
OCTOBER 21 2018.......SUNRISE 711 AM CDT SUNSET 601 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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