Black Walnut Weather Forecast

    • 68
    • 87

    Rain Showers

    • 67
    • 87

    Mostly Sunny

    • 69
    • 88

    Mostly Sunny

    • 72
    • 92

    Mostly Sunny

    • 75
    • 93

    Partly Sunny

    • 76
    • 94

    Chance Thunderstorms

    • 73
    • 91

    Chance Thunderstorms

Today 30 Jun St. Charles

Partly sunny with scattered Showers and Thunderstorms. Near steady temperature in the upper 80s. West Winds 5 to 10 Mph. Chance of rain 50 percent.

Tonight 30 Jun St. Charles

Mostly cloudy. Showers and Thunderstorms Likely, mainly this evening. Lows in the upper 60s. Northwest Winds 5 to 10 Mph. Chance of rain 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Black Walnut Temperature Statistics

June Temperature

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

  • Lowest 10 June, 2025

    57.7 °F

  • Average June

    76.6 °F

  • Highest 21 June, 2025

    96.7 °F

Climate (2020–Present)

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

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  • Average Low 2020–2025

    47.3 °F

  • Average 2020–2025

    57.6 °F

  • Average High 2020–2025

    68.3 °F
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