Collinsville Weather Forecast

    • 47
    • 73

    Sunny

    • 58
    • 74

    Mostly Sunny

    • 68
    • 82

    Rain Showers Likely

    • 68
    • 88

    Chance Thunderstorms

    • 72
    • 88

    Chance Thunderstorms

    • 70
    • 91

    Rain Showers Likely

Today 13 May Madison

Sunny. Highs in the mid 70s. Northwest Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 13 May Madison

Mostly clear. Lows in the upper 50s. Northwest Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Collinsville Temperature Statistics

May Temperature

Belleville, Scott AFB/MidAmerica Airport (10.6 miles)

  • Lowest 7 May, 2026

    40.1 °F

  • Average May

    60.1 °F

  • Highest 9 May, 2026

    81 °F

Climate (2021–Present)

Belleville, Scott AFB/MidAmerica Airport (10.6 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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