733  
CDUS43 KLOT 200632  
CLIORD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE CHICAGO IL  
131 AM CDT THU SEP 20 2018  
 
   
...............................
 
 
   
..THE CHICAGO-OHARE CLIMATE SUMMARY FOR SEPTEMBER 19 2018
 
 
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)  
YESTERDAY  
MAXIMUM 76 1105 AM 93 1955 74 2 79  
MINIMUM 66 636 PM 40 1991 53 13 64  
AVERAGE 71 63 8 72  
 
PRECIPITATION (IN)  
YESTERDAY 0.21 1.72 2001 0.11 0.10 0.07  
MONTH TO DATE 3.25 2.07 1.18 0.32  
SINCE SEP 1 3.25 2.07 1.18 0.32  
SINCE JAN 1 37.48 27.20 10.28 32.06  
 
SNOWFALL (IN)  
YESTERDAY 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 T  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 0 4 -4 0  
MONTH TO DATE 1 40 -39 29  
SINCE SEP 1 1 40 -39 29  
SINCE JUL 1 1 53 -52 34  
 
COOLING  
YESTERDAY 6 2 4 7  
MONTH TO DATE 153 76 77 64  
SINCE SEP 1 153 76 77 64  
SINCE JAN 1 1230 816 414 847    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION N (10)  
HIGHEST GUST SPEED 20 HIGHEST GUST DIRECTION N (340)  
AVERAGE WIND SPEED 9.2  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.7  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
THUNDERSTORM  
HEAVY RAIN  
LIGHT RAIN  
FOG  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 93 800 PM  
LOWEST 60 1100 AM  
AVERAGE 77  
   
......................................................
 
 
 
THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 73 92 2017  
MINIMUM TEMPERATURE (F) 52 36 1991  
 
 
SUNRISE AND SUNSET  
SEPTEMBER 20 2018.....SUNRISE 637 AM CDT SUNSET 652 PM CDT  
SEPTEMBER 21 2018.....SUNRISE 638 AM CDT SUNSET 651 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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