Climatological Report (Monthly)
Issued by NWS
Issued by NWS
218
CXUS53 KLOT 011517
CLMDPA
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
1017 AM CDT FRI AUG 01 2025
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...THE DUPAGE AIRPORT CLIMATE SUMMARY FOR THE MONTH OF JULY 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 100 07/07/2012
07/06/2012
07/24/2005
LOW 42 07/02/2001
HIGHEST 94 07/23 91 07/13
LOWEST 56 07/18 48 07/01
AVG. MAXIMUM 86.3 84.0 2.3 83.1
AVG. MINIMUM 66.8 63.3 3.5 63.1
MEAN 76.5 73.7 2.8 73.1
DAYS MAX >= 90 11 5.6 5.4 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 9.62 2023
MINIMUM 1.17 2018
TOTALS 6.96 3.62 3.34 4.56
DAILY AVG. 0.22 0.12 0.10 0.15
DAYS >= .01 13 10.2 2.8 12
DAYS >= .10 11 6.0 5.0 8
DAYS >= .50 5 2.5 2.5 5
DAYS >= 1.00 3 0.9 2.1 2
GREATEST
24 HR. TOTAL 1.86 07/10 TO 07/11 1.17
DEGREE DAYS
HEATING TOTAL 0 4 -4 3
SINCE 7/1 0 0 0 MM
COOLING TOTAL 365 272 93 262
SINCE 1/1 665 503 162 MM
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WIND (MPH)
AVERAGE WIND SPEED 6.5
HIGHEST WIND SPEED/DIRECTION 26/350 DATE 07/10
26/290 07/24
HIGHEST GUST SPEED/DIRECTION 35/360 DATE 07/10
AVERAGE RH (PERCENT) 72
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 11 MIXED PRECIP 0
HEAVY RAIN 12 RAIN 9
LIGHT RAIN 17 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 22 FOG W/VIS <= 1/4 MILE 0
HAZE 10
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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