Summerville Weather Forecast

    • 44
    • 62

    Becoming Sunny

    • 52
    • 68

    Chance Rain Showers

    • 53
    • 67

    Rain Showers

    • 52
    • 64

    Chance Rain Showers

    • 52
    • 65

    Chance Rain Showers

    • 51
    • 66

    Slight Chance Rain Showers

Today 22 May Macoupin

Sunny in the Morning, then partly sunny with scattered Sprinkles in the afternoon. Highs in the lower 60s. Northwest Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 22 May Macoupin

Partly cloudy in the Evening, then clearing. Lows in the mid 40s. Northwest Winds 10 to 15 Mph, Diminishing to around 5 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Summerville Temperature Statistics

May Temperature

St. Louis Regional Airport (21.1 miles)

  • Lowest 6 May, 2025

    44.8 °F

  • Average May

    61.4 °F

  • Highest 15 May, 2025

    86 °F

Climate (2020–Present)

St. Louis Regional Airport (21.1 miles)

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  • Average Low 2020–2025

    46 °F

  • Average 2020–2025

    53.8 °F

  • Average High 2020–2025

    66 °F
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