Belleville Weather Forecast

    • 47
    • 71

    Mostly Sunny

    • 46
    • 74

    Sunny

    • 48
    • 75

    Mostly Sunny

    • 50
    • 79

    Sunny

    • 50
    • 75

    Mostly Sunny

    • 53
    • 76

    Partly Sunny

Today 19 Oct St. Clair

Partly cloudy. Lows in the lower 50s. Highs in the mid 70s.

Tonight 19 Oct St. Clair

Partly cloudy. Lows in the mid 40s. East Winds around 5 Mph.

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Belleville Temperature Statistics

October Temperature

Belleville, Scott AFB/MidAmerica Airport (7.5 miles)

  • Lowest 17 October, 2026

    42.6 °F

  • Average October

    67.2 °F

  • Highest 13 October, 2026

    94.5 °F

Climate (2021–2026)

Belleville, Scott AFB/MidAmerica Airport (7.5 miles)

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  • Average Low 2021–2026

    48 °F

  • Average 2021–2026

    58 °F

  • Average High 2021–2026

    68.2 °F
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