Collinsville Weather Forecast

    • 78
    • 96

    Hot

    • 78
    • 97

    Slight Chance Thunderstorms

    • 77
    • 96

    Slight Chance Thunderstorms

    • 76
    • 95

    Slight Chance Thunderstorms

    • 75
    • 93

    Chance Thunderstorms

Today 1 Jul Madison

Sunny, hot with Highs in the mid 90s. Southwest Winds 5 to 10 Mph. Heat index Values up to 108.

Tonight 1 Jul Madison

Clear with Lows in the upper 70s. South Winds 5 to 10 Mph. Heat index Values up to 107 early in the evening.

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Collinsville Temperature Statistics

July Temperature

Belleville, Scott AFB/MidAmerica Airport (10.6 miles)

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  • Average July

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Climate (2021–2026)

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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