Mascoutah Weather Forecast

    • 67
    • 77

    Rain Showers Likely

    • 51
    • 84

    Rain Showers

    • 40
    • 57

    Mostly Cloudy

    • 37
    • 62

    Sunny

    • 43
    • 70

    Partly Sunny

    • 48
    • 73

    Partly Sunny

Today 14 Oct St. Clair

Cloudy with a chance of Showers with a slight chance of Thunderstorms. Much cooler. Near steady temperature in the mid 70s. Northwest Winds around 5 Mph. Chance of rain 30 percent.

Tonight 14 Oct St. Clair

Cloudy. Showers likely with a chance of Thunderstorms after midnight. Lows in the upper 60s. Northeast Winds around 5 Mph. Chance of rain 70 percent.

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Mascoutah Temperature Statistics

October Temperature

Belleville, Scott AFB/MidAmerica Airport (5 miles)

  • Lowest 6 October, 2026

    45.7 °F

  • Average October

    67.6 °F

  • Highest 12 October, 2026

    93.6 °F

Climate (2021–2026)

Belleville, Scott AFB/MidAmerica Airport (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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