822  
CDUS43 KLOT 200636  
CLIORD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE CHICAGO IL  
1236 AM CST MON NOV 20 2017  
 
   
...............................
 
 
   
..THE CHICAGO-OHARE CLIMATE SUMMARY FOR NOVEMBER 19 2017
 
 
CLIMATE NORMAL PERIOD 1981 TO 2010  
CLIMATE RECORD PERIOD 1871 TO 2017  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
..............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 37 1238 AM 75 1930 46 -9 39  
MINIMUM 30 1159 PM 10 1894 31 -1 28  
AVERAGE 34 39 -5 34  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 0.96 1985 0.11 -0.11 0.01  
MONTH TO DATE 1.73 1.99 -0.26 0.42  
SINCE SEP 1 10.75 8.35 2.40 5.95  
SINCE JAN 1 42.49 33.48 9.01 32.93  
 
SNOWFALL (IN)  
YESTERDAY 0.0 2.2 1955 0.0 0.0 T  
MONTH TO DATE 0.1 0.3 -0.2 T  
SINCE SEP 1 0.1 0.5 -0.4 T  
SINCE JUL 1 0.1 0.5 -0.4 T  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 31 26 5 31  
MONTH TO DATE 494 417 77 251  
SINCE SEP 1 782 919 -137 540  
SINCE JUL 1 787 932 -145 540  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 0 0 0 3  
SINCE SEP 1 208 103 105 192  
SINCE JAN 1 991 843 148 1157    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 22 HIGHEST WIND DIRECTION NW (310)  
HIGHEST GUST SPEED 26 HIGHEST GUST DIRECTION NW (320)  
AVERAGE WIND SPEED 13.2  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.6  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 69 800 PM  
LOWEST 44 200 PM  
AVERAGE 57  
   
......................................................
 
 
 
THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 46 68 1930  
1913  
MINIMUM TEMPERATURE (F) 31 8 1873  
 
 
SUNRISE AND SUNSET  
NOVEMBER 20 2017......SUNRISE 648 AM CST SUNSET 426 PM CST  
NOVEMBER 21 2017......SUNRISE 649 AM CST SUNSET 426 PM CST  
 
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
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