Mermet Lake Weather Forecast

    • 39
    • 57

    Increasing Clouds

    • 45
    • 64

    Partly Sunny

    • 61
    • 74

    Partly Sunny

    • 47
    • 85

    Rain Showers Likely

    • 33
    • 58

    Chance Rain Showers

    • 37
    • 57

    Mostly Sunny

Today 23 Mar Massac

Sunny. Much cooler with Highs in the upper 50s. North Winds 10 to 15 Mph.

Tonight 23 Mar Massac

Mostly cloudy. Lows in the upper 30s. Northeast Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Mermet Lake Temperature Statistics

March Temperature

Metropolis Municipal Airport (7.5 miles)

  • Lowest 19 March, 2026

    38.3 °F

  • Average March

    63.8 °F

  • Highest 21 March, 2026

    83.3 °F

Climate (2021–Present)

Metropolis Municipal Airport (7.5 miles)

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  • Average Low 2021–2026

    48.8 °F

  • Average 2021–2026

    59 °F

  • Average High 2021–2026

    69.4 °F
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