521  
CDUS43 KLOT 010631  
CLIDPA  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE CHICAGO IL  
131 AM CDT SUN AUG 01 2021  
   
...............................
 
 
...THE DU PAGE AIRPORT CLIMATE SUMMARY FOR JULY 31 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 79 3:54 PM 98 2006 84 -5 82  
MINIMUM 58 5:05 AM 50 1997 63 -5 61  
AVERAGE 69 73 -4 72  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.05 0.12 -0.12 0.00  
MONTH TO DATE 2.49 3.62 -1.13 1.69  
SINCE JUN 1 9.20 7.27 1.93 2.19  
SINCE JAN 1 14.35 19.53 -5.18 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 4 8 -4 7  
MONTH TO DATE 261 272 -11 348  
SINCE JUN 1 511 447 64 583  
SINCE JAN 1 592 503 89 634    
...............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 4 RESULTANT WIND DIRECTION W (260)  
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION W (280)  
HIGHEST GUST SPEED 21 HIGHEST GUST DIRECTION W (250)  
AVERAGE WIND SPEED 5.3  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
   
......................................................
 
 
THE DU PAGE AIRPORT CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 83 96 2006  
MINIMUM TEMPERATURE (F) 63 51 1998  
 
SUNRISE AND SUNSET  
AUGUST 1 2021........SUNRISE 5:47 AM CDT SUNSET 8:11 PM CDT  
AUGUST 2 2021........SUNRISE 5:48 AM CDT SUNSET 8:10 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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