Summerville Weather Forecast

    • 49
    • 75

    Mostly Sunny

    • 59
    • 75

    Chance Thunderstorms

    • 49
    • 80

    Rain Showers

    • 47
    • 68

    Chance Rain Showers

    • 43
    • 66

    Mostly Sunny

    • 44
    • 66

    Slight Chance Rain Showers

Today 25 Apr Macoupin

Sunny. Highs in the mid 70s. Northeast Winds 5 to 10 Mph.

Tonight 25 Apr Macoupin

Mostly clear. Lows in the upper 40s. East Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Summerville Temperature Statistics

April Temperature

St. Louis Regional Airport (21.1 miles)

  • Lowest 5 April, 2026

    38.8 °F

  • Average April

    60 °F

  • Highest 3 April, 2026

    82.4 °F

Climate (2021–Present)

St. Louis Regional Airport (21.1 miles)

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  • Average Low 2021–2026

    46.4 °F

  • Average 2021–2026

    54.4 °F

  • Average High 2021–2026

    66.7 °F
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