Climatological Report (Monthly)
Issued by NWS
Issued by NWS
932
CXUS53 KLOT 011258
CLMDPA
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
758 AM CDT WED OCT 01 2025
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...THE DUPAGE AIRPORT CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2025...
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1997 TO 2025
WEATHER OBSERVED NORMAL DEPART LAST YEAR`S
VALUE DATE(S) VALUE FROM VALUE DATE(S)
NORMAL
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TEMPERATURE (F)
RECORD
HIGH 95 09/02/2008
LOW 32 09/24/2012
HIGHEST 90 09/29 92 09/21
LOWEST 42 09/07 44 09/08
AVG. MAXIMUM 80.1 75.5 4.6 79.9
AVG. MINIMUM 54.8 53.7 1.1 54.8
MEAN 67.4 64.6 2.8 67.3
DAYS MAX >= 90 1 1.7 -0.7 2
DAYS MAX <= 32 0 0.0 0.0 0
DAYS MIN <= 32 0 0.0 0.0 0
DAYS MIN <= 0 0 0.0 0.0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 12.26 2008
MINIMUM 0.30 2017
TOTALS 0.64 3.00 -2.36 1.42
DAILY AVG. 0.02 0.10 -0.08 0.05
DAYS >= .01 6 10.0 -4.0 3
DAYS >= .10 2 5.2 -3.2 2
DAYS >= .50 0 1.8 -1.8 2
DAYS >= 1.00 0 0.7 -0.7 0
GREATEST
24 HR. TOTAL 0.31 09/13 TO 09/13 0.86
DEGREE DAYS
HEATING TOTAL 47 100 -53 33
SINCE 7/1 58 111 -53 MM
COOLING TOTAL 127 88 39 110
SINCE 1/1 1035 812 223 MM
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WIND (MPH)
AVERAGE WIND SPEED 5.5
HIGHEST WIND SPEED/DIRECTION 24/340 DATE 09/03
24/010 09/13
HIGHEST GUST SPEED/DIRECTION 33/260 DATE 09/05
33/270 09/06
AVERAGE RH (PERCENT) 66
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 3 MIXED PRECIP 0
HEAVY RAIN 2 RAIN 1
LIGHT RAIN 5 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 17 FOG W/VIS <= 1/4 MILE 2
HAZE 8
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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