327  
CDUS43 KLOT 300633  
CLIDPA  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE CHICAGO IL  
133 AM CDT FRI JUL 30 2021  
   
...............................
 
 
...THE DU PAGE AIRPORT CLIMATE SUMMARY FOR JULY 29 2021...  
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1997 TO 2021  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 90 2:29 PM 95 1999 84 6 89  
MINIMUM 64 11:59 PM 52 1997 63 1 69  
2003  
2013  
AVERAGE 77 74 3 79  
 
PRECIPITATION (IN)  
YESTERDAY 0.19 0.53 0.11 0.08 0.05  
MONTH TO DATE 2.49 3.37 -0.88 1.69  
SINCE JUN 1 9.20 7.02 2.18 2.19  
SINCE JAN 1 14.35 19.28 -4.93 20.09  
 
DEGREE DAYS  
HEATING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE JUN 1 11 33 -22 16  
SINCE JUL 1 0 0 0 0  
 
COOLING  
YESTERDAY 12 9 3 14  
MONTH TO DATE 254 257 -3 333  
SINCE JUN 1 504 432 72 568  
SINCE JAN 1 585 488 97 619    
...............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 6 RESULTANT WIND DIRECTION NW (300)  
HIGHEST WIND SPEED 40 HIGHEST WIND DIRECTION N (360)  
HIGHEST GUST SPEED 65 HIGHEST GUST DIRECTION N (350)  
AVERAGE WIND SPEED 12.7  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
THUNDERSTORM  
HEAVY RAIN  
LIGHT RAIN  
FOG  
   
......................................................
 
 
THE DU PAGE AIRPORT CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 84 98 1999  
MINIMUM TEMPERATURE (F) 63 49 1997  
 
SUNRISE AND SUNSET  
JULY 30 2021..........SUNRISE 5:45 AM CDT SUNSET 8:13 PM CDT  
JULY 31 2021..........SUNRISE 5:46 AM CDT SUNSET 8:12 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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