Belleville Weather Forecast

    • 11
    • 24

    Decreasing Clouds

    • 27
    • 39

    Partly Sunny

    • 29
    • 38

    Chance Freezing Rain

    • 17
    • 38

    Mostly Cloudy

    • 23
    • 33

    Partly Sunny

    • 33
    • 46

    Mostly Cloudy

    • 24
    • 47

    Slight Chance Rain

Today 4 Dec St. Clair

Partly sunny and cooler. Near steady temperature in the lower 20s. North Winds around 5 Mph.

Tonight 4 Dec St. Clair

Mostly clear. Lows 6 to 12 above. Northeast Winds around 5 Mph, becoming southeast after midnight.

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Belleville Temperature Statistics

December Temperature

Belleville, Scott AFB/MidAmerica Airport (7.5 miles)

  • Lowest 2 December, 2025

    21.4 °F

  • Average December

    25.6 °F

  • Highest 1 December, 2025

    27.9 °F

Climate (2020–Present)

Belleville, Scott AFB/MidAmerica Airport (7.5 miles)

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  • Average Low 2020–2025

    47.6 °F

  • Average 2020–2025

    57.5 °F

  • Average High 2020–2025

    67.6 °F
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