Mermet Lake Weather Forecast

    • 30
    • 56

    Increasing Clouds

    • 30
    • 46

    Partly Sunny

    • 50
    • 55

    Chance Rain

    • 50
    • 63

    Slight Chance Rain

    • 57
    • 65

    Mostly Cloudy

    • 57
    • 70

    Partly Sunny

    • 50
    • 67

    Partly Sunny

Today 20 Dec Massac

Mostly sunny. Highs in the mid 50s. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 20 Dec Massac

Partly cloudy. Lows around 30. North Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Mermet Lake Temperature Statistics

December Temperature

Metropolis Municipal Airport (7.5 miles)

  • Lowest 14 December, 2025

    9.5 °F

  • Average December

    34.6 °F

  • Highest 17 December, 2025

    59 °F

Climate (2021–Present)

Metropolis Municipal Airport (7.5 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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