Climatological Report (Daily)
Issued by NWS
Issued by NWS
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065
CDUS43 KLOT 152141
CLIDPA
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
441 PM CDT FRI AUG 15 2025
...................................
...THE DUPAGE AIRPORT CLIMATE SUMMARY FOR AUGUST 15 2025...
VALID TODAY AS OF 0400 PM LOCAL TIME.
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1997 TO 2025
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...................................................................
TEMPERATURE (F)
TODAY
MAXIMUM 91R 2:33 PM 89 2000 82 9 75
2009
2015
MINIMUM 64 1:09 AM 44 2004 62 2 67
AVERAGE 78 72 6 71
PRECIPITATION (IN)
TODAY 0.00 0.66 2018 0.13 -0.13 0.30
MONTH TO DATE 0.29 1.90 -1.61 1.04
SINCE JUN 1 9.90 9.17 0.73 10.63
SINCE JAN 1 17.96 21.43 -3.47 23.27
DEGREE DAYS
HEATING
TODAY 0 0 0 0
MONTH TO DATE 0 0 0 2
SINCE JUN 1 18 37 -19 18
SINCE JUL 1 0 4 -4 5
COOLING
TODAY 13 7 6 6
MONTH TO DATE 158 119 39 104
SINCE JUN 1 790 566 224 608
SINCE JAN 1 823 622 201 662
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION S (200)
HIGHEST GUST SPEED 22 HIGHEST GUST DIRECTION S (180)
AVERAGE WIND SPEED 3.8
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
HAZE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 81 3:00 AM
LOWEST 47 2:00 PM
AVERAGE 64
..........................................................
THE DUPAGE AIRPORT CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 82 90 1997
2003
MINIMUM TEMPERATURE (F) 62 49 2004
SUNRISE AND SUNSET
AUGUST 15 2025........SUNRISE 6:01 AM CDT SUNSET 7:53 PM CDT
AUGUST 16 2025........SUNRISE 6:02 AM CDT SUNSET 7:51 PM CDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$