Summerville Weather Forecast

    • 19
    • 43

    Chance Snow

    • 10
    • 24

    Mostly Cloudy

    • 11
    • 30

    Partly Sunny

    • 7
    • 19

    Mostly Sunny

    • 21
    • 32

    Partly Sunny

    • 19
    • 40

    Partly Sunny

Today 16 Jan Macoupin

Mostly cloudy. A chance of snow this Morning, then a chance of rain this afternoon. Not as cool with Highs in the lower 40s. West Winds 10 to 15 Mph with Gusts up to 30 Mph. Chance of precipitation 40 percent.

Tonight 16 Jan Macoupin

Mostly cloudy with a chance of snow in the Evening, then partly cloudy after midnight. Lows around 19. West Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of snow 50 percent.

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Summerville Temperature Statistics

January Temperature

St. Louis Regional Airport (21.1 miles)

  • Lowest 4 January, 2026

    20.7 °F

  • Average January

    39.2 °F

  • Highest 6 January, 2026

    64.4 °F

Climate (2021–Present)

St. Louis Regional Airport (21.1 miles)

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  • Average Low 2021–2026

    46.2 °F

  • Average 2021–2026

    54.1 °F

  • Average High 2021–2026

    66.3 °F
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