Lake Geneva Weather Forecast

    • 65
    • 88

    Partly Sunny

    • 66
    • 89

    Decreasing Clouds

    • 67
    • 90

    Mostly Sunny

    • 69
    • 90

    Mostly Sunny

    • 71
    • 89

    Chance Rain Showers

    • 71
    • 87

    Chance Thunderstorms

    • 71
    • 89

    Chance Thunderstorms

Today 16 Sep Western Clay

Sunny. Highs in the upper 80s. Northeast Winds 5 to 10 Mph.

Tonight 16 Sep Western Clay

Partly cloudy. Lows in the mid 60s. East Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Geneva Temperature Statistics

September Temperature

Keystone Airpark (5 miles)

  • Lowest 14 September, 2025

    62.6 °F

  • Average September

    76.9 °F

  • Highest 5 September, 2025

    93.2 °F

Climate (2020–Present)

Keystone Airpark (5 miles)

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  • Average Low 2020–2025

    58.8 °F

  • Average 2020–2025

    68.6 °F

  • Average High 2020–2025

    80.1 °F
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