St Charles Weather Forecast

    • 71
    • 89

    Mostly Sunny

    • 63
    • 84

    Areas Smoke

    • 68
    • 84

    Rain Showers Likely

    • 67
    • 88

    Rain Showers Likely

    • 58
    • 78

    Mostly Sunny

    • 57
    • 76

    Mostly Sunny

    • 61
    • 79

    Partly Sunny

Today 17 Jul Winona

Mostly sunny. Highs in the upper 80s. Southwest Winds 5 to 10 Mph.

Tonight 17 Jul Winona

Partly cloudy. Lows in the lower 70s. Southwest Winds 5 to 10 Mph. Heat index Values in the mid 90s early this evening.

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St Charles Temperature Statistics

July Temperature

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

  • Lowest 5 July, 2026

    64.4 °F

  • Average July

    75.6 °F

  • Highest 14 July, 2026

    91.4 °F

Climate (2021–2026)

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

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  • Average Low 2021–2026

    39.3 °F

  • Average 2021–2026

    48.4 °F

  • Average High 2021–2026

    57.6 °F
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