Belleville Weather Forecast

    • 71
    • 89

    Partly Sunny

    • 72
    • 91

    Mostly Cloudy

    • 72
    • 86

    Rain Showers

    • 72
    • 85

    Rain Showers

    • 74
    • 91

    Chance Thunderstorms

    • 75
    • 93

    Mostly Sunny

Today 5 Jun St. Clair

Mostly sunny. A slight chance of Showers and Thunderstorms this afternoon. Highs in the upper 80s. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 20 percent.

Tonight 5 Jun St. Clair

Partly cloudy. Lows around 70. Southwest Winds 10 to 15 Mph.

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Belleville Temperature Statistics

June Temperature

Belleville, Scott AFB/MidAmerica Airport (7.5 miles)

  • Lowest 3 June, 2026

    55.2 °F

  • Average June

    72.1 °F

  • Highest 1 June, 2026

    87.8 °F

Climate (2021–Present)

Belleville, Scott AFB/MidAmerica Airport (7.5 miles)

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  • Average Low 2021–2026

    47.8 °F

  • Average 2021–2026

    57.8 °F

  • Average High 2021–2026

    68.1 °F
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