Harriman Weather Forecast

    • 26
    • 43

    Becoming Sunny

    • 36
    • 55

    Mostly Sunny

    • 30
    • 54

    Partly Sunny

    • 38
    • 52

    Partly Sunny

    • 46
    • 52

    Slight Chance Rain Showers

    • 51
    • 62

    Mostly Cloudy

Today 19 Dec Roane

Sunny. Highs in the mid 40s. West Winds 5 to 10 Mph.

Tonight 19 Dec Roane

Rain Showers with a slight chance of Thunderstorms. Cold with Lows in the lower 30s. West Winds 5 to 15 Mph with Gusts up to 30 Mph. Chance of rain near 100 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Harriman Temperature Statistics

December Temperature

Oak Ridge (18.6 miles)

  • Lowest 15 December, 2025

    12.9 °F

  • Average December

    36.5 °F

  • Highest 13 December, 2025

    55 °F

Climate (2020–Present)

Oak Ridge (18.6 miles)

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  • Average Low 2020–2025

    50.6 °F

  • Average 2020–2025

    60.4 °F

  • Average High 2020–2025

    70.9 °F
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