Lemont Weather Forecast

    • 37
    • 43

    Cloudy

    • 31
    • 48

    Mostly Cloudy

    • 40
    • 43

    Rain Likely

    • 42
    • 46

    Rain Likely

    • 38
    • 52

    Mostly Cloudy

    • 28
    • 52

    Mostly Cloudy

    • 15
    • 33

    Breezy

Today 22 Dec Southern Cook

Mostly cloudy. A slight chance of Sprinkles in the afternoon. Highs in the lower 40s. South Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 22 Dec Southern Cook

Cloudy. A slight chance of rain in the evening. Near steady temperature around 40. Southwest Winds around 10 Mph. Chance of precipitation 20 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Lemont Temperature Statistics

December Temperature

Lewis University Airport (6.8 miles)

  • Lowest 14 December, 2025

    -2.2 °F

  • Average December

    22.5 °F

  • Highest 18 December, 2025

    50 °F

Climate (2020–Present)

Lewis University Airport (6.8 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2020–2025

    43.6 °F

  • Average 2020–2025

    52.4 °F

  • Average High 2020–2025

    61.7 °F
Get WillyWeather+ to remove ads