Collinsville Weather Forecast

    • 55
    • 75

    Rain Likely

    • 54
    • 67

    Mostly Cloudy

    • 56
    • 64

    Rain

    • 59
    • 73

    Chance Thunderstorms

    • 58
    • 79

    Chance Thunderstorms

    • 59
    • 80

    Chance Thunderstorms

Today 25 May Henry

Partly sunny. Near steady temperature in the lower 70s. South Winds around 5 Mph.

Tonight 25 May Henry

Cloudy. A chance of rain in the Evening, then rain likely after midnight. Lows in the mid 50s. Southeast Winds around 5 Mph, becoming north after midnight. Chance of rain 60 percent.

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Collinsville Temperature Statistics

May Temperature

Martinsville (7.5 miles)

  • Lowest 10 May, 2025

    36 °F

  • Average May

    64.5 °F

  • Highest 15 May, 2025

    84.2 °F

Climate (2020–Present)

Martinsville (7.5 miles)

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  • Average Low 2020–2025

    45.5 °F

  • Average 2020–2025

    57.2 °F

  • Average High 2020–2025

    69.2 °F
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