Lemont Weather Forecast

    • 53
    • 71

    Mostly Cloudy

    • 33
    • 79

    Chance Thunderstorms

    • 28
    • 44

    Mostly Sunny

    • 37
    • 54

    Partly Sunny

    • 46
    • 60

    Partly Sunny

    • 49
    • 67

    Slight Chance Thunderstorms

Today 25 Mar Southern Cook

Mostly cloudy. Highs in the lower 70s. South Winds 10 to 15 Mph. Gusts up to 25 Mph in the afternoon.

Tonight 25 Mar Southern Cook

Mostly cloudy in the Evening, then becoming partly cloudy. A slight chance of Showers and Thunderstorms after midnight. Lows in the lower 50s. South Winds around 10 Mph. Chance of precipitation 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lemont Temperature Statistics

March Temperature

Lewis University Airport (6.8 miles)

  • Lowest 17 March, 2026

    11.6 °F

  • Average March

    43.1 °F

  • Highest 21 March, 2026

    77.6 °F

Climate (2021–Present)

Lewis University Airport (6.8 miles)

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  • Average Low 2021–2026

    43.5 °F

  • Average 2021–2026

    52.4 °F

  • Average High 2021–2026

    61.8 °F
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