French Island Weather Forecast

    • 63
    • 84

    Slight Chance Thunderstorms

    • 61
    • 85

    Chance Rain Showers

    • 61
    • 83

    Mostly Cloudy

    • 58
    • 74

    Chance Thunderstorms

    • 58
    • 74

    Chance Rain Showers

    • 58
    • 75

    Slight Chance Thunderstorms

Today 16 Sep La Crosse

Mostly cloudy. A slight chance of Showers and Thunderstorms. Highs in the mid 80s. South Winds around 5 Mph. Chance of rain 20 percent.

Tonight 16 Sep La Crosse

Partly cloudy. A slight chance of Showers after midnight. Humid with Lows in the lower 60s. South Winds around 5 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

French Island Temperature Statistics

September Temperature

La Crosse - La Crosse Regional Airport (1.2 miles)

  • Lowest 7 September, 2025

    39.9 °F

  • Average September

    62.7 °F

  • Highest 12 September, 2025

    86 °F

Climate (2020–Present)

La Crosse - La Crosse Regional Airport (1.2 miles)

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  • Average Low 2020–2025

    40.9 °F

  • Average 2020–2025

    50.2 °F

  • Average High 2020–2025

    59.8 °F
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