Sinclair Lake Weather Forecast

    • 18
    • 54

    Slight Chance Rain/Snow

    • 12
    • 24

    Becoming Sunny

    • 22
    • 36

    Mostly Sunny

    • 30
    • 45

    Partly Sunny

    • 38
    • 48

    Mostly Cloudy

    • 33
    • 55

    Rain Showers Likely

    • 34
    • 46

    Partly Sunny

Today 13 Dec Rhea

Sunny. Highs in the mid to upper 50s. Light Winds.

Tonight 13 Dec Rhea

Mostly cloudy. A slight chance of rain Showers after midnight. Cold with Lows around 20. Northwest Winds 5 to 15 Mph. Gusts up to 30 Mph after midnight. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Sinclair Lake Temperature Statistics

December Temperature

Crossville, Crossville Memorial-Whitson Field Airport (24.2 miles)

  • Lowest 1 December, 2025

    23 °F

  • Average December

    35.4 °F

  • Highest 7 December, 2025

    51.1 °F

Climate (2020–Present)

Crossville, Crossville Memorial-Whitson Field Airport (24.2 miles)

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  • Average Low 2020–2025

    47.2 °F

  • Average 2020–2025

    56.6 °F

  • Average High 2020–2025

    66.4 °F
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