Collinsville Weather Forecast

    • 16
    • 35

    Mostly Sunny

    • 30
    • 45

    Partly Sunny

    • 28
    • 55

    Mostly Sunny

    • 18
    • 45

    Mostly Cloudy

    • 13
    • 25

    Chance Rain/Snow

Today 20 Jan Henry

Sunny. Near steady temperature in the mid 30s. West Winds 5 to 10 Mph.

Tonight 20 Jan Henry

Mostly clear. Cold with Lows around 17. Northwest Winds around 5 Mph in the Evening, becoming light and variable.

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Collinsville Temperature Statistics

January Temperature

Martinsville (7.5 miles)

  • Lowest 16 January, 2026

    11.7 °F

  • Average January

    40.9 °F

  • Highest 7 January, 2026

    70.3 °F

Climate (2021–Present)

Martinsville (7.5 miles)

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  • Average Low 2021–2026

    45.3 °F

  • Average 2021–2026

    57.1 °F

  • Average High 2021–2026

    69.1 °F
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