024
CDUS43 KLOT 180640
CLIDPA
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
140 AM CDT THU SEP 18 2025
...............................
...THE DUPAGE AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 17 2025...
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)
YESTERDAY
MAXIMUM 85 3:43 PM 92 2018 75 10 86
MINIMUM 54 5:07 AM 40 1999 53 1 53
AVERAGE 70 64 6 70
PRECIPITATION (IN)
YESTERDAY 0.00 0.84 2023 0.10 -0.10 0.00
MONTH TO DATE 0.34 1.69 -1.35 T
SINCE SEP 1 0.34 1.69 -1.35 T
SINCE JAN 1 20.87 25.06 -4.19 24.32
DEGREE DAYS
HEATING
YESTERDAY 0 3 -3 0
MONTH TO DATE 47 31 16 22
SINCE SEP 1 47 31 16 22
SINCE JUL 1 58 42 16 31
COOLING
YESTERDAY 5 3 2 5
MONTH TO DATE 49 66 -17 63
SINCE SEP 1 49 66 -17 63
SINCE JAN 1 957 790 167 861
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 10 HIGHEST WIND DIRECTION NE (40)
HIGHEST GUST SPEED 13 HIGHEST GUST DIRECTION NE (40)
AVERAGE WIND SPEED 2.8
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
FOG
HAZE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 4:00 AM
LOWEST 38 12:00 PM
AVERAGE 66
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THE DUPAGE AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 75 88 2007
MINIMUM TEMPERATURE (F) 53 41 2012
SUNRISE AND SUNSET
SEPTEMBER 18 2025.....SUNRISE 6:37 AM CDT SUNSET 6:57 PM CDT
SEPTEMBER 19 2025.....SUNRISE 6:38 AM CDT SUNSET 6:55 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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