Mason Lake Weather Forecast

    • 24
    • 39

    Mostly Cloudy

    • 37
    • 46

    Partly Sunny

    • 27
    • 51

    Mostly Cloudy

    • 29
    • 41

    Slight Chance Rain/Snow

    • 24
    • 48

    Partly Sunny

    • 23
    • 38

    Partly Sunny

Today 8 Dec Overton

Cloudy. Near steady temperature in the mid 30s. North Winds 5 to 10 Mph.

Tonight 8 Dec Overton

Mostly cloudy. Lows in the mid 20s. North Winds around 5 Mph, becoming southwest after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Mason Lake Temperature Statistics

December Temperature

Sparta Upper Cumberland Regional Airport (17.4 miles)

  • Lowest 1 December, 2025

    23 °F

  • Average December

    34.1 °F

  • Highest 6 December, 2025

    46.4 °F

Climate (2020–Present)

Sparta Upper Cumberland Regional Airport (17.4 miles)

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  • Average Low 2020–2025

    47 °F

  • Average 2020–2025

    59.3 °F

  • Average High 2020–2025

    70 °F
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