Brussels Weather Forecast

    • 69
    • 91

    Partly Sunny

    • 63
    • 85

    Slight Chance Rain Showers

    • 70
    • 86

    Mostly Sunny

    • 71
    • 95

    Chance Thunderstorms

    • 70
    • 94

    Chance Thunderstorms

    • 65
    • 87

    Chance Rain Showers

Today 12 Sep Calhoun

Patchy fog this morning. Sunny. Highs around 90. Southwest Winds around 5 Mph, becoming west around 5 Mph this afternoon.

Tonight 12 Sep Calhoun

Partly cloudy in the Evening, then becoming mostly cloudy. Lows in the mid 60s. North Winds around 5 Mph.

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Brussels Temperature Statistics

September Temperature

St. Charles, St. Charles County Smartt Airport (8.1 miles)

  • Lowest 8 September, 2026

    62.7 °F

  • Average September

    82.4 °F

  • Highest 2 September, 2026

    101.6 °F

Climate (2021–2026)

St. Charles, St. Charles County Smartt Airport (8.1 miles)

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  • Average Low 2021–2026

    47.4 °F

  • Average 2021–2026

    58.1 °F

  • Average High 2021–2026

    69 °F
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