650  
CDUS43 KLOT 210647  
CLIORD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE CHICAGO IL  
146 AM CDT SAT SEP 21 2019  
 
   
...............................
 
 
   
..THE CHICAGO-OHARE CLIMATE SUMMARY FOR SEPTEMBER 20 2019
 
 
CLIMATE NORMAL PERIOD 1981 TO 2010  
CLIMATE RECORD PERIOD 1871 TO 2019  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
..............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 84 429 PM 93 2018 73 11 93  
MINIMUM 68 600 AM 36 1991 52 16 66  
AVERAGE 76 63 13 80  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.33 2001 0.11 -0.11 0.00  
MONTH TO DATE 2.93 2.18 0.75 3.25  
SINCE SEP 1 2.93 2.18 0.75 3.25  
SINCE JAN 1 34.68 27.31 7.37 37.48  
 
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 0.0  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 0 4 -4 0  
MONTH TO DATE 2 44 -42 1  
SINCE SEP 1 2 44 -42 1  
SINCE JUL 1 2 57 -55 1  
 
COOLING  
YESTERDAY 11 2 9 15  
MONTH TO DATE 114 78 36 168  
SINCE SEP 1 114 78 36 168  
SINCE JAN 1 910 818 92 1245    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 12 HIGHEST WIND DIRECTION SW (210)  
HIGHEST GUST SPEED 15 HIGHEST GUST DIRECTION SW (210)  
AVERAGE WIND SPEED 3.8  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.7  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 90 700 AM  
LOWEST 55 300 PM  
AVERAGE 73  
   
......................................................
 
 
 
THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 73 94 2017  
MINIMUM TEMPERATURE (F) 52 39 1991  
1983  
1889  
 
 
SUNRISE AND SUNSET  
SEPTEMBER 21 2019.....SUNRISE 638 AM CDT SUNSET 651 PM CDT  
SEPTEMBER 22 2019.....SUNRISE 639 AM CDT SUNSET 649 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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