Horse Heaven Reservoir Weather Forecast

    • 21
    • 51

    Mostly Sunny

    • 26
    • 57

    Partly Sunny

    • 28
    • 61

    Partly Sunny

    • 25
    • 54

    Partly Sunny

    • 23
    • 50

    Partly Sunny

    • 23
    • 53

    Partly Sunny

Today 23 Oct Ochoco-John Day Highlands

Mostly sunny. Widespread frost in the morning. Highs in the mid 40s to lower 50s. Northwest wind 5 to 15 Mph with Gusts to around 30 Mph.

Tonight 23 Oct Ochoco-John Day Highlands

Mostly clear. Widespread frost. Lows 18 to 28.

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Horse Heaven Reservoir Temperature Statistics

October Temperature

Prineville Airport (23 miles)

  • Lowest 11 October, 2026

    17.6 °F

  • Average October

    52.4 °F

  • Highest 4 October, 2026

    86 °F

Climate (2021–2026)

Prineville Airport (23 miles)

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  • Average Low 2021–2026

    34.6 °F

  • Average 2021–2026

    49.6 °F

  • Average High 2021–2026

    63 °F
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