Fontana-on-Geneva Lake Weather Forecast

    • 64
    • 80

    Slight Chance Thunderstorms

    • 53
    • 75

    Mostly Sunny

    • 48
    • 69

    Mostly Sunny

    • 46
    • 66

    Mostly Sunny

    • 47
    • 68

    Mostly Sunny

    • 53
    • 71

    Mostly Sunny

    • 54
    • 74

    Partly Sunny

Today 22 Aug Walworth

Partly sunny. Southwest Winds around 5 Mph.

Tonight 22 Aug Walworth

Mostly cloudy. A 20 percent chance of light Showers and Thunderstorms after midnight. Lows in the mid 60s. Southwest Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Fontana-on-Geneva Lake Temperature Statistics

August Temperature

Burlington Municipal Airport (16.2 miles)

  • Lowest 2 August, 2025

    48.6 °F

  • Average August

    70.5 °F

  • Highest 9 August, 2025

    88.9 °F

Climate (2020–Present)

Burlington Municipal Airport (16.2 miles)

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  • Average Low 2020–2025

    39.5 °F

  • Average 2020–2025

    49.9 °F

  • Average High 2020–2025

    59.6 °F
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