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Climate & Weather Averages in Wheaton, Illinois, USA

Currently: 89 °F. Sunny. (Weather station: Dupage Airport, USA). See more current weather

Annual Weather Averages Near Wheaton

Averages are for Dupage Airport, which is 8 miles from Wheaton.

Based on weather reports collected during 1992–2021.

All Year Climate & Weather Averages in Wheaton

High Temp: 84 °F

Low Temp: 16 °F

Mean Temp: 49 °F

Precipitation: 2.76"

Humidity: 72%

Dew Point: 40 °F

Wind: 15 mph

Pressure: 30.04 "Hg

Visibility: 9 mi

January Climate & Weather Averages in Wheaton

High Temp: 31 °F

Low Temp: 16 °F

Mean Temp: 23 °F

Precipitation: 1.45"

Humidity: 79%

Dew Point: 18 °F

Wind: 18 mph

Pressure: 30.10 "Hg

Visibility: 8 mi

February Climate & Weather Averages in Wheaton

High Temp: 35 °F

Low Temp: 18 °F

Mean Temp: 26 °F

Precipitation: 1.34"

Humidity: 75%

Dew Point: 20 °F

Wind: 18 mph

Pressure: 30.10 "Hg

Visibility: 8 mi

March Climate & Weather Averages in Wheaton

High Temp: 47 °F

Low Temp: 27 °F

Mean Temp: 37 °F

Precipitation: 1.88"

Humidity: 70%

Dew Point: 28 °F

Wind: 18 mph

Pressure: 30.09 "Hg

Visibility: 9 mi

April Climate & Weather Averages in Wheaton

High Temp: 60 °F

Low Temp: 37 °F

Mean Temp: 48 °F

Precipitation: 3.39"

Humidity: 65%

Dew Point: 36 °F

Wind: 19 mph

Pressure: 29.98 "Hg

Visibility: 10 mi

May Climate & Weather Averages in Wheaton

High Temp: 71 °F

Low Temp: 48 °F

Mean Temp: 59 °F

Precipitation: 4.19"

Humidity: 68%

Dew Point: 48 °F

Wind: 16 mph

Pressure: 29.98 "Hg

Visibility: 9 mi

June Climate & Weather Averages in Wheaton

High Temp: 81 °F

Low Temp: 58 °F

Mean Temp: 69 °F

Precipitation: 3.92"

Humidity: 68%

Dew Point: 58 °F

Wind: 13 mph

Pressure: 29.94 "Hg

Visibility: 9 mi

July Climate & Weather Averages in Wheaton

High Temp: 84 °F

Low Temp: 63 °F

Mean Temp: 73 °F

Precipitation: 3.45"

Humidity: 70%

Dew Point: 63 °F

Wind: 12 mph

Pressure: 29.97 "Hg

Visibility: 9 mi

August Climate & Weather Averages in Wheaton

High Temp: 82 °F

Low Temp: 61 °F

Mean Temp: 72 °F

Precipitation: 3.41"

Humidity: 73%

Dew Point: 62 °F

Wind: 11 mph

Pressure: 30.00 "Hg

Visibility: 9 mi

September Climate & Weather Averages in Wheaton

High Temp: 76 °F

Low Temp: 53 °F

Mean Temp: 64 °F

Precipitation: 3.10"

Humidity: 71%

Dew Point: 54 °F

Wind: 12 mph

Pressure: 30.03 "Hg

Visibility: 9 mi

October Climate & Weather Averages in Wheaton

High Temp: 63 °F

Low Temp: 41 °F

Mean Temp: 52 °F

Precipitation: 3.06"

Humidity: 71%

Dew Point: 43 °F

Wind: 15 mph

Pressure: 30.04 "Hg

Visibility: 10 mi

November Climate & Weather Averages in Wheaton

High Temp: 48 °F

Low Temp: 30 °F

Mean Temp: 39 °F

Precipitation: 2.17"

Humidity: 74%

Dew Point: 31 °F

Wind: 17 mph

Pressure: 30.09 "Hg

Visibility: 9 mi

December Climate & Weather Averages in Wheaton

High Temp: 36 °F

Low Temp: 21 °F

Mean Temp: 28 °F

Precipitation: 1.71"

Humidity: 79%

Dew Point: 23 °F

Wind: 17 mph

Pressure: 30.09 "Hg

Visibility: 8 mi

Quick Climate Info

Hottest MonthJuly (73 °F avg)
Coldest MonthJanuary (23 °F avg)
Wettest MonthMay (4.19" avg)
Windiest MonthApril (19 mph avg)
Annual precip.33.08" (per year)

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