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Climate & Weather Averages in Effingham, Illinois, USA

Currently: 76 °F. Sunny. (Weather station: Effingham County Memorial Airport, USA). See more current weather

Annual Weather Averages Near Effingham

Averages are for Effingham County Memorial Airport, which is 4 miles from Effingham.

Based on weather reports collected during 1992–2021.

All Year Climate & Weather Averages in Effingham

High Temp: 85 °F

Low Temp: 21 °F

Mean Temp: 53 °F

Precipitation: 3.05"

Humidity: 73%

Dew Point: 44 °F

Wind: 15 mph

Pressure: 30.04 "Hg

Visibility: 9 mi

January Climate & Weather Averages in Effingham

High Temp: 36 °F

Low Temp: 21 °F

Mean Temp: 28 °F

Precipitation: 2.12"

Humidity: 80%

Dew Point: 22 °F

Wind: 18 mph

Pressure: 30.13 "Hg

Visibility: 8 mi

February Climate & Weather Averages in Effingham

High Temp: 40 °F

Low Temp: 24 °F

Mean Temp: 32 °F

Precipitation: 1.69"

Humidity: 76%

Dew Point: 25 °F

Wind: 18 mph

Pressure: 30.11 "Hg

Visibility: 8 mi

March Climate & Weather Averages in Effingham

High Temp: 52 °F

Low Temp: 33 °F

Mean Temp: 42 °F

Precipitation: 2.26"

Humidity: 70%

Dew Point: 33 °F

Wind: 18 mph

Pressure: 30.08 "Hg

Visibility: 9 mi

April Climate & Weather Averages in Effingham

High Temp: 64 °F

Low Temp: 43 °F

Mean Temp: 53 °F

Precipitation: 4.12"

Humidity: 66%

Dew Point: 42 °F

Wind: 18 mph

Pressure: 29.97 "Hg

Visibility: 9 mi

May Climate & Weather Averages in Effingham

High Temp: 74 °F

Low Temp: 54 °F

Mean Temp: 64 °F

Precipitation: 4.00"

Humidity: 69%

Dew Point: 53 °F

Wind: 15 mph

Pressure: 29.97 "Hg

Visibility: 9 mi

June Climate & Weather Averages in Effingham

High Temp: 83 °F

Low Temp: 63 °F

Mean Temp: 73 °F

Precipitation: 4.84"

Humidity: 70%

Dew Point: 62 °F

Wind: 12 mph

Pressure: 29.94 "Hg

Visibility: 9 mi

July Climate & Weather Averages in Effingham

High Temp: 85 °F

Low Temp: 66 °F

Mean Temp: 76 °F

Precipitation: 4.04"

Humidity: 74%

Dew Point: 67 °F

Wind: 10 mph

Pressure: 29.98 "Hg

Visibility: 9 mi

August Climate & Weather Averages in Effingham

High Temp: 84 °F

Low Temp: 64 °F

Mean Temp: 74 °F

Precipitation: 2.47"

Humidity: 75%

Dew Point: 65 °F

Wind: 9 mph

Pressure: 30.00 "Hg

Visibility: 9 mi

September Climate & Weather Averages in Effingham

High Temp: 79 °F

Low Temp: 56 °F

Mean Temp: 68 °F

Precipitation: 2.83"

Humidity: 69%

Dew Point: 57 °F

Wind: 11 mph

Pressure: 30.03 "Hg

Visibility: 9 mi

October Climate & Weather Averages in Effingham

High Temp: 66 °F

Low Temp: 45 °F

Mean Temp: 56 °F

Precipitation: 3.23"

Humidity: 69%

Dew Point: 45 °F

Wind: 15 mph

Pressure: 30.05 "Hg

Visibility: 10 mi

November Climate & Weather Averages in Effingham

High Temp: 52 °F

Low Temp: 34 °F

Mean Temp: 43 °F

Precipitation: 2.95"

Humidity: 73%

Dew Point: 34 °F

Wind: 17 mph

Pressure: 30.12 "Hg

Visibility: 9 mi

December Climate & Weather Averages in Effingham

High Temp: 40 °F

Low Temp: 26 °F

Mean Temp: 33 °F

Precipitation: 2.06"

Humidity: 79%

Dew Point: 27 °F

Wind: 16 mph

Pressure: 30.11 "Hg

Visibility: 8 mi

Quick Climate Info

Hottest MonthJuly (76 °F avg)
Coldest MonthJanuary (28 °F avg)
Wettest MonthJune (4.84" avg)
Windiest MonthApril (18 mph avg)
Annual precip.36.62" (per year)

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