Lake Geneva Weather Forecast

    • 55
    • 75

    Slight Chance Rain Showers

    • 54
    • 83

    Mostly Sunny

    • 54
    • 83

    Mostly Sunny

    • 56
    • 85

    Mostly Sunny

    • 57
    • 85

    Mostly Sunny

    • 59
    • 85

    Mostly Cloudy

Today 13 Sep Clinton

Partly sunny with a 20 percent chance of Showers. Highs in the mid 70s. South Winds around 5 Mph.

Tonight 13 Sep Clinton

Mostly clear. Lows in the mid 50s. Light Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Geneva Temperature Statistics

September Temperature

Capital Region International Airport (3.7 miles)

  • Lowest 8 September, 2025

    39 °F

  • Average September

    59.6 °F

  • Highest 2 September, 2025

    78.1 °F

Climate (2020–Present)

Capital Region International Airport (3.7 miles)

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  • Average Low 2020–2025

    42 °F

  • Average 2020–2025

    51 °F

  • Average High 2020–2025

    60 °F
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