Black Walnut Weather Forecast

    • 59
    • 82

    Decreasing Clouds

    • 59
    • 83

    Mostly Sunny

    • 59
    • 81

    Partly Sunny

    • 64
    • 84

    Rain Showers Likely

    • 52
    • 78

    Rain Showers Likely

    • 46
    • 70

    Slight Chance Rain Showers

Today 14 Oct St. Charles

Mostly sunny. Highs in the lower 80s. East Winds around 5 Mph.

Tonight 14 Oct St. Charles

Mostly clear. Lows in the upper 50s. East Winds around 5 Mph.

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Black Walnut Temperature Statistics

October Temperature

St. Charles, St. Charles County Smartt Airport (5 miles)

  • Lowest 8 October, 2025

    44.1 °F

  • Average October

    67.6 °F

  • Highest 3 October, 2025

    90 °F

Climate (2020–Present)

St. Charles, St. Charles County Smartt Airport (5 miles)

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  • Average Low 2020–2025

    47.4 °F

  • Average 2020–2025

    57.7 °F

  • Average High 2020–2025

    68.5 °F
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