Scott Air Force Base/Midamerica Airport Weather Forecast

    • 56
    • 80

    Increasing Clouds

    • 44
    • 69

    Mostly Cloudy

    • 49
    • 71

    Mostly Sunny

    • 56
    • 77

    Slight Chance Thunderstorms

    • 50
    • 76

    Mostly Sunny

    • 57
    • 77

    Slight Chance Thunderstorms

Today 9 May St. Clair

Sunny. Highs around 80. West Winds 10 to 15 Mph.

Tonight 9 May St. Clair

Partly cloudy in the Evening, then becoming mostly cloudy. A slight chance of Thunderstorms in the evening. A chance of Showers. Lows in the mid 50s. Southwest Winds around 5 Mph, becoming north after midnight. Chance of rain 40 percent.

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Scott Air Force Base/Midamerica Airport Temperature Statistics

May Temperature

Belleville, Scott AFB/MidAmerica Airport (0.6 miles)

  • Lowest 1 May, 2026

    44.4 °F

  • Average May

    58.6 °F

  • Highest 4 May, 2026

    77.5 °F

Climate (2021–Present)

Belleville, Scott AFB/MidAmerica Airport (0.6 miles)

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  • Average Low 2021–2026

    47.8 °F

  • Average 2021–2026

    57.8 °F

  • Average High 2021–2026

    68 °F
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