Belleville Weather Forecast

    • 70
    • 88

    Rain Showers Likely

    • 64
    • 81

    Rain Showers Likely

    • 59
    • 79

    Chance Thunderstorms

    • 61
    • 85

    Rain Showers Likely

    • 42
    • 71

    Chance Rain Showers

    • 41
    • 65

    Mostly Sunny

Today 14 Apr St. Clair

Mostly sunny. A slight chance of Showers and Thunderstorms this morning. Highs in the upper 80s. Southwest Winds 15 to 20 Mph. Chance of rain 20 percent.

Tonight 14 Apr St. Clair

Partly cloudy in the Evening, then becoming mostly cloudy. A slight chance of Thunderstorms. A slight chance of Showers in the Evening, then a chance of Showers after midnight. Lows in the upper 60s. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 30 percent.

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Belleville Temperature Statistics

April Temperature

Belleville, Scott AFB/MidAmerica Airport (7.5 miles)

  • Lowest 6 April, 2026

    38.8 °F

  • Average April

    60.4 °F

  • Highest 3 April, 2026

    81.3 °F

Climate (2021–Present)

Belleville, Scott AFB/MidAmerica Airport (7.5 miles)

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  • Average Low 2021–2026

    47.6 °F

  • Average 2021–2026

    57.7 °F

  • Average High 2021–2026

    67.9 °F
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