Unionville Weather Forecast

    • 30
    • 41

    Mostly Sunny

    • 32
    • 55

    Partly Sunny

    • 30
    • 47

    Partly Sunny

    • 45
    • 51

    Chance Rain Showers

    • 53
    • 60

    Slight Chance Rain Showers

    • 57
    • 66

    Mostly Cloudy

Today 19 Dec Massac

Sunny, cooler with Highs in the lower 40s. West Winds around 5 Mph.

Tonight 19 Dec Massac

Mostly clear. Lows in the lower 30s. South Winds 5 to 10 Mph.

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Unionville Temperature Statistics

December Temperature

Metropolis Municipal Airport (11.8 miles)

  • Lowest 14 December, 2025

    9.5 °F

  • Average December

    33.6 °F

  • Highest 17 December, 2025

    59 °F

Climate (2021–Present)

Metropolis Municipal Airport (11.8 miles)

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  • Average Low 2021–2025

    49 °F

  • Average 2021–2025

    59.2 °F

  • Average High 2021–2025

    69.6 °F
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