Scott Air Force Base/Midamerica Airport Weather Forecast

    • 65
    • 88

    Decreasing Clouds

    • 69
    • 88

    Partly Sunny

    • 72
    • 97

    Slight Chance Thunderstorms

    • 72
    • 95

    Partly Sunny

    • 67
    • 91

    Chance Rain Showers

    • 64
    • 88

    Slight Chance Thunderstorms

Today 13 Sep St. Clair

Partly sunny. Highs in the upper 80s. North Winds 5 to 10 Mph.

Tonight 13 Sep St. Clair

Partly cloudy in the Evening, then becoming mostly cloudy. Lows in the mid 60s. Northeast Winds 5 to 10 Mph.

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Scott Air Force Base/Midamerica Airport Temperature Statistics

September Temperature

Belleville, Scott AFB/MidAmerica Airport (0.6 miles)

  • Lowest 8 September, 2026

    60.1 °F

  • Average September

    82.3 °F

  • Highest 5 September, 2026

    101.8 °F

Climate (2021–2026)

Belleville, Scott AFB/MidAmerica Airport (0.6 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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