Threemile Reservoir Weather Forecast

    • 31
    • 53

    Increasing Clouds

    • 41
    • 64

    Partly Sunny

    • 44
    • 71

    Mostly Cloudy

    • 43
    • 72

    Chance Rain Showers

    • 39
    • 64

    Rain/Snow Likely

    • 35
    • 54

    Rain/Snow Likely

Today 17 Apr Harney County

Sunny. Not as cool with Highs 49 to 54. South Winds around 10 Mph.

Tonight 17 Apr Harney County

Increasing Clouds. Lows 24 to 31. East Winds up to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Threemile Reservoir Temperature Statistics

April Temperature

Rome (53.4 miles)

  • Lowest 3 April, 2026

    19.7 °F

  • Average April

    48.2 °F

  • Highest 6 April, 2026

    76.6 °F

Climate (2021–Present)

Rome (53.4 miles)

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  • Average Low 2021–2026

    36.8 °F

  • Average 2021–2026

    51.7 °F

  • Average High 2021–2026

    66.1 °F
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