Fontana-on-Geneva Lake Weather Forecast

    • 68
    • 90

    Thunderstorms Likely

    • 63
    • 81

    Chance Thunderstorms

    • 68
    • 84

    Partly Sunny

    • 70
    • 92

    Chance Thunderstorms

    • 64
    • 85

    Chance Thunderstorms

    • 62
    • 84

    Mostly Sunny

Today 26 Jun Walworth

Warm and humid. Mostly sunny with a 40 percent chance of light Showers and Thunderstorms. Highs in the upper 80s. Southwest Winds 5 to 10 Mph. Highest heat index Readings 95 to 99 in the afternoon.

Tonight 26 Jun Walworth

Partly cloudy in the evening then becoming mostly cloudy. Chance of light Showers and Thunderstorms in the Evening, then Showers and Thunderstorms likely late in the evening. Chance of light Showers and Thunderstorms after midnight. Lows in the upper 60s. Southwest Winds 5 to 10 Mph. Chance of precipitation 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Fontana-on-Geneva Lake Temperature Statistics

June Temperature

Burlington Municipal Airport (16.2 miles)

  • Lowest 1 June, 2025

    38.5 °F

  • Average June

    68.2 °F

  • Highest 22 June, 2025

    93.4 °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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