Summerville Weather Forecast

    • 47
    • 60

    Slight Chance Rain Showers

    • 47
    • 62

    Mostly Cloudy

    • 52
    • 71

    Partly Sunny

    • 54
    • 70

    Chance Rain Showers

    • 50
    • 72

    Chance Rain Showers

    • 48
    • 70

    Slight Chance Rain Showers

    • 51
    • 74

    Slight Chance Rain Showers

Today 4 May Macoupin

Cloudy with a 20 percent chance of Showers. Near steady temperature around 60. North Winds 10 to 15 Mph.

Tonight 4 May Macoupin

Mostly cloudy. A slight chance of Showers after midnight. Lows in the upper 40s. Northeast Winds 5 to 10 Mph, becoming northwest after midnight. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Summerville Temperature Statistics

May Temperature

St. Louis Regional Airport (21.1 miles)

  • Lowest 2 May, 2025

    55 °F

  • Average May

    62.7 °F

  • Highest 1 May, 2025

    71.6 °F

Climate (2020–Present)

St. Louis Regional Airport (21.1 miles)

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  • Average Low 2020–2025

    45.9 °F

  • Average 2020–2025

    53.8 °F

  • Average High 2020–2025

    65.9 °F
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