921
CDUS43 KLOT 170633
CLIDPA
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
133 AM CDT THU SEP 17 2026
...............................
...THE DUPAGE AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 16 2026...
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1997 TO 2026
WEATHER ITEM OBSERVED RECORD YEAR NORMAL DEPARTURE LAST
VALUE VALUE VALUE FROM YEAR
NORMAL
........................................................
TEMPERATURE (F)
YESTERDAY
MAXIMUM 75 89 2018 76 -1 86
2024
MINIMUM 63 39 2000 54 9 56
AVERAGE 69 65 4 71
PRECIPITATION (IN)
YESTERDAY T 0.11 2023 0.10 -0.10 0.00
MONTH TO DATE 0.16 1.59 -1.43 0.34
SINCE SEP 1 0.16 1.59 -1.43 0.34
SINCE JAN 1 29.30 24.96 4.34 20.87
DEGREE DAYS
HEATING
YESTERDAY 0 3 -3 0
MONTH TO DATE 10 28 -18 47
SINCE SEP 1 10 28 -18 47
SINCE JUL 1 11 39 -28 58
COOLING
YESTERDAY 4 3 1 6
MONTH TO DATE 139 63 76 44
SINCE SEP 1 139 63 76 44
SINCE JAN 1 820 787 33 952
........................................................
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 9:00 PM
LOWEST 64 10:00 AM
AVERAGE 79
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THE DUPAGE AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 75 92 2018
MINIMUM TEMPERATURE (F) 53 40 1999
SUNRISE AND SUNSET
SEPTEMBER 17 2026.....SUNRISE 6:35 AM CDT SUNSET 6:59 PM CDT
SEPTEMBER 18 2026.....SUNRISE 6:36 AM CDT SUNSET 6:57 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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