Fontana-on-Geneva Lake Weather Forecast

    • 31
    • 36

    Rain Likely

    • 10
    • 43

    Rain

    • 18
    • 25

    Mostly Cloudy

    • 12
    • 38

    Mostly Cloudy

    • 14
    • 25

    Partly Sunny

    • 26
    • 32

    Mostly Cloudy

Today 17 Dec Walworth

Partly sunny in the morning then clearing. Highs in the mid 30s. Northwest Winds 5 to 10 Mph shifting to the south in the afternoon.

Tonight 17 Dec Walworth

Mostly cloudy. Light rain likely early in the morning. Lows in the upper 20s. South Winds 10 to 20 Mph. Chance of rain 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Fontana-on-Geneva Lake Temperature Statistics

December Temperature

Burlington Municipal Airport (16.2 miles)

  • Lowest 4 December, 2025

    -1.1 °F

  • Average December

    17.7 °F

  • Highest 10 December, 2025

    37.4 °F

Climate (2020–Present)

Burlington Municipal Airport (16.2 miles)

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  • Average Low 2020–2025

    39.4 °F

  • Average 2020–2025

    49.9 °F

  • Average High 2020–2025

    59.6 °F
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