Threemile Reservoir Weather Forecast

    • 58
    • 90

    Becoming Sunny

    • 60
    • 95

    Partly Sunny

    • 62
    • 95

    Partly Sunny

    • 59
    • 93

    Mostly Cloudy

    • 54
    • 88

    Mostly Sunny

    • 56
    • 89

    Mostly Sunny

Today 18 Aug Harney County

Patchy smoke early. Partly cloudy. Highs 82 to 92. West Winds up to 10 Mph. Gusts to 20 Mph this afternoon.

Tonight 18 Aug Harney County

Increasing Clouds. Lows 49 to 58. Northwest Winds 10 to 15 Mph.

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Threemile Reservoir Temperature Statistics

August Temperature

Rome (53.4 miles)

  • Lowest 3 August, 2026

    42.7 °F

  • Average August

    75.1 °F

  • Highest 6 August, 2026

    103.6 °F

Climate (2021–2026)

Rome (53.4 miles)

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  • Average Low 2021–2026

    36.5 °F

  • Average 2021–2026

    51.4 °F

  • Average High 2021–2026

    66.1 °F
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