Collinsville Weather Forecast

    • 76
    • 93

    Isolated Thunderstorms

    • 74
    • 90

    Thunderstorms

    • 72
    • 89

    Chance Thunderstorms

    • 73
    • 90

    Slight Chance Thunderstorms

    • 71
    • 89

    Chance Thunderstorms

    • 71
    • 91

    Chance Thunderstorms

    • 72
    • 91

    Chance Thunderstorms

Today 5 Jul Madison

Sunny. Near steady temperature in the lower 90s. South Winds 5 to 10 Mph with Gusts up to 20 Mph.

Tonight 5 Jul Madison

Partly cloudy with isolated Showers and Thunderstorms. Lows in the mid 70s. Southwest Winds around 5 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Collinsville Temperature Statistics

July Temperature

Belleville, Scott AFB/MidAmerica Airport (10.6 miles)

  • Lowest 2 July, 2025

    65.8 °F

  • Average July

    79.9 °F

  • Highest 3 July, 2025

    91.6 °F

Climate (2020–Present)

Belleville, Scott AFB/MidAmerica Airport (10.6 miles)

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  • Average Low 2020–2025

    47.3 °F

  • Average 2020–2025

    57.1 °F

  • Average High 2020–2025

    67.3 °F
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