Fontana-on-Geneva Lake Weather Forecast

    • 60
    • 83

    Increasing Clouds

    • 61
    • 82

    Rain Showers Likely

    • 61
    • 77

    Chance Thunderstorms

    • 61
    • 77

    Chance Thunderstorms

    • 60
    • 77

    Chance Rain Showers

    • 56
    • 75

    Slight Chance Thunderstorms

Today 18 Sep Walworth

Sunny. Highs in the mid 80s. East Winds around 5 Mph.

Tonight 18 Sep Walworth

Partly cloudy through around midnight then becoming mostly cloudy. Lows in the lower 60s. East Winds up to 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Fontana-on-Geneva Lake Temperature Statistics

September Temperature

Burlington Municipal Airport (16.2 miles)

  • Lowest 8 September, 2025

    36.9 °F

  • Average September

    60.4 °F

  • Highest 16 September, 2025

    82.4 °F

Climate (2020–Present)

Burlington Municipal Airport (16.2 miles)

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  • Average Low 2020–2025

    39.4 °F

  • Average 2020–2025

    49.8 °F

  • Average High 2020–2025

    59.5 °F
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