Threemile Reservoir Weather Forecast

    • 22
    • 35

    Increasing Clouds

    • 23
    • 36

    Mostly Sunny

    • 26
    • 42

    Mostly Sunny

    • 29
    • 45

    Mostly Sunny

    • 33
    • 49

    Mostly Cloudy

    • 35
    • 49

    Rain/Snow Likely

    • 30
    • 47

    Chance Rain/Snow

Today 27 Dec Harney County

Mostly sunny. Highs 32 to 37. Windy. West Winds 15 to 25 Mph with Gusts to 35 Mph.

Tonight 27 Dec Harney County

Increasing Clouds. Lows 18 to 23. Northwest Winds 10 to 15 Mph. Gusts to 25 Mph in the evening.

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  • Temperature Real-Time

Threemile Reservoir Temperature Statistics

December Temperature

Rome (53.4 miles)

  • Lowest 1 December, 2025

    14 °F

  • Average December

    42.7 °F

  • Highest 10 December, 2025

    66 °F

Climate (2020–Present)

Rome (53.4 miles)

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  • Average Low 2020–2025

    36.7 °F

  • Average 2020–2025

    51.5 °F

  • Average High 2020–2025

    65.9 °F
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