Collinsville Weather Forecast

    • 37
    • 54

    Mostly Cloudy

    • 43
    • 62

    Partly Sunny

    • 60
    • 76

    Partly Sunny

    • 43
    • 89

    Rain Showers Likely

    • 32
    • 52

    Slight Chance Rain Showers

    • 37
    • 57

    Partly Sunny

Today 23 Mar Madison

Partly sunny. Much cooler with Highs in the mid 50s. Northeast Winds 5 to 10 Mph.

Tonight 23 Mar Madison

Mostly cloudy. Lows in the upper 30s. East Winds 5 to 10 Mph.

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Collinsville Temperature Statistics

March Temperature

Belleville, Scott AFB/MidAmerica Airport (10.6 miles)

  • Lowest 16 March, 2026

    23.9 °F

  • Average March

    53.3 °F

  • Highest 20 March, 2026

    89.1 °F

Climate (2021–Present)

Belleville, Scott AFB/MidAmerica Airport (10.6 miles)

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  • Average Low 2021–2026

    47.6 °F

  • Average 2021–2026

    57.6 °F

  • Average High 2021–2026

    67.9 °F
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