Lake Geneva Weather Forecast

    • 58
    • 65

    Rain Showers

    • 49
    • 68

    Rain Showers Likely

    • 46
    • 63

    Mostly Cloudy

    • 49
    • 62

    Chance Rain Showers

    • 49
    • 62

    Chance Rain Showers

    • 49
    • 66

    Mostly Cloudy

    • 48
    • 69

    Partly Sunny

Today 19 Sep Clinton

Mostly sunny. Highs in the lower 70s.

Tonight 19 Sep Clinton

Rain Showers and a chance of Thunderstorms. Lows in the upper 50s. East Winds around 10 Mph. Gusts up to 20 Mph in the evening. Chance of rain 90 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Geneva Temperature Statistics

September Temperature

Capital Region International Airport (3.7 miles)

  • Lowest 14 September, 2026

    44.7 °F

  • Average September

    69.3 °F

  • Highest 2 September, 2026

    91.7 °F

Climate (2021–2026)

Capital Region International Airport (3.7 miles)

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  • Average Low 2021–2026

    41.8 °F

  • Average 2021–2026

    50.9 °F

  • Average High 2021–2026

    60.1 °F
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