Black Walnut Weather Forecast

    • 72
    • 91

    Mostly Sunny

    • 74
    • 92

    Mostly Sunny

    • 75
    • 91

    Chance Thunderstorms

    • 75
    • 91

    Chance Thunderstorms

    • 76
    • 94

    Mostly Sunny

    • 76
    • 94

    Mostly Sunny

    • 76
    • 95

    Mostly Sunny

Today 14 Jul St. Charles

Sunny. Near steady temperature in the upper 80s. Northeast Winds 5 to 10 Mph.

Tonight 14 Jul St. Charles

Mostly clear. Lows in the lower 70s. Northeast Winds around 5 Mph.

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  • Temperature Real-Time

Black Walnut Temperature Statistics

July Temperature

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

  • Lowest 5 July, 2026

    69.7 °F

  • Average July

    81 °F

  • Highest 2 July, 2026

    97.6 °F

Climate (2021–2026)

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

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  • Average Low 2021–2026

    47.3 °F

  • Average 2021–2026

    58 °F

  • Average High 2021–2026

    68.9 °F
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