Climatological Report (Monthly)
Issued by NWS
Issued by NWS
778
CXUS53 KLOT 011449
CLMDPA
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
949 AM CDT MON SEP 01 2025
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...THE DUPAGE AIRPORT CLIMATE SUMMARY FOR THE MONTH OF AUGUST 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 97 08/02/2006
LOW 43 08/31/2009
HIGHEST 95 08/16 97 08/27
LOWEST 48 08/26 48 08/22
AVG. MAXIMUM 82.5 82.0 0.5 82.7
AVG. MINIMUM 61.8 61.8 0.0 61.9
MEAN 72.2 71.9 0.3 72.3
DAYS MAX >= 90 4 2.9 1.1 5
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 6.19 2002
MINIMUM 0.96 2020
TOTALS 2.86 3.84 -0.98 2.09
DAILY AVG. 0.09 0.12 -0.03 0.07
DAYS >= .01 7 10.9 -3.9 9
DAYS >= .10 6 5.6 0.4 6
DAYS >= .50 2 2.6 -0.6 1
DAYS >= 1.00 1 0.9 0.1 0
GREATEST
24 HR. TOTAL 1.50 08/18 TO 08/19 0.64
DEGREE DAYS
HEATING TOTAL 11 7 4 6
SINCE 7/1 11 6 5 MM
COOLING TOTAL 243 221 22 240
SINCE 1/1 908 724 184 MM
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WIND (MPH)
AVERAGE WIND SPEED 6.8
HIGHEST WIND SPEED/DIRECTION 30/360 DATE 08/16
HIGHEST GUST SPEED/DIRECTION 43/190 DATE 08/11
AVERAGE RH (PERCENT) 70
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 8 MIXED PRECIP 0
HEAVY RAIN 5 RAIN 3
LIGHT RAIN 9 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 0
HAZE 9
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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