Climatological Report (Monthly)
Issued by NWS
Issued by NWS
926
CXUS53 KLOT 011258
CLMPWK
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
758 AM CDT WED OCT 01 2025
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...THE CHICAGO EXECUTIVE AIRPORT CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2025...
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1996 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 96 09/22/2017
09/10/2013
LOW 34 09/24/2012
HIGHEST 89 09/29 92 09/21
LOWEST 46 09/07 46 09/08
09/08
AVG. MAXIMUM 78.8 75.3 3.5 79.2
AVG. MINIMUM 57.7 56.3 1.4 58.0
MEAN 68.3 65.8 2.4 68.6
DAYS MAX >= 90 0 1.7 -1.7 1
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 9.43 2008
MINIMUM 0.31 2004
TOTALS 1.70 3.04 -1.34 0.99
DAILY AVG. 0.06 0.10 -0.04 0.03
DAYS >= .01 5 9.5 -4.5 5
DAYS >= .10 4 5.4 -1.4 2
DAYS >= .50 1 1.7 -0.7 1
DAYS >= 1.00 1 0.7 0.3 0
GREATEST
24 HR. TOTAL 1.29 09/13 TO 09/13 0.64
DEGREE DAYS
HEATING TOTAL 34 82 -48 20
SINCE 7/1 42 89 -47 MM
COOLING TOTAL 140 106 34 138
SINCE 1/1 1064 920 144 MM
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WIND (MPH)
AVERAGE WIND SPEED 4.7
HIGHEST WIND SPEED/DIRECTION 29/020 DATE 09/13
HIGHEST GUST SPEED/DIRECTION 46/010 DATE 09/13
AVERAGE RH (PERCENT) 68
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 4 MIXED PRECIP 0
HEAVY RAIN 3 RAIN 4
LIGHT RAIN 6 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 9 FOG W/VIS <= 1/4 MILE 1
HAZE 0
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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