Mermet Lake Weather Forecast

    • 59
    • 70

    Increasing Clouds

    • 56
    • 79

    Mostly Cloudy

    • 58
    • 81

    Partly Sunny

    • 55
    • 82

    Mostly Sunny

    • 56
    • 81

    Partly Sunny

    • 56
    • 82

    Partly Sunny

    • 61
    • 86

    Partly Sunny

Today 22 Sep Massac

Mostly sunny. A chance of Showers in the afternoon. Highs in the upper 80s. Chance of rain 30 percent.

Tonight 22 Sep Massac

Partly cloudy this Evening, then becoming mostly cloudy. Lows in the upper 50s. North Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Mermet Lake Temperature Statistics

September Temperature

Metropolis Municipal Airport (7.5 miles)

  • Lowest 8 September, 2026

    60.8 °F

  • Average September

    80.5 °F

  • Highest 5 September, 2026

    101.3 °F

Climate (2021–2026)

Metropolis Municipal Airport (7.5 miles)

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  • Average Low 2021–2026

    49.6 °F

  • Average 2021–2026

    59.8 °F

  • Average High 2021–2026

    70.3 °F
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