St Charles Weather Forecast

    • 45
    • 64

    Increasing Clouds

    • 56
    • 74

    Chance Thunderstorms

    • 56
    • 71

    Chance Rain Showers

    • 55
    • 76

    Mostly Sunny

    • 58
    • 77

    Partly Sunny

    • 61
    • 78

    Slight Chance Thunderstorms

Today 7 Sep Winona

Mostly sunny. Highs in the mid 60s. Northwest Winds around 5 Mph.

Tonight 7 Sep Winona

Mostly clear in the Evening, then becoming partly cloudy. Lows in the mid 40s. South Winds 5 to 10 Mph.

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St Charles Temperature Statistics

September Temperature

Winona, Winona Municipal Airport-Max Conrad Field (19.3 miles)

  • Lowest 4 September, 2025

    41 °F

  • Average September

    58.7 °F

  • Highest 1 September, 2025

    77 °F

Climate (2020–Present)

Winona, Winona Municipal Airport-Max Conrad Field (19.3 miles)

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  • Average Low 2020–2025

    39.1 °F

  • Average 2020–2025

    48.2 °F

  • Average High 2020–2025

    57.2 °F
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