Collins Reservoir Weather Forecast

    • 29
    • 48

    Chance Rain/Snow

    • 32
    • 52

    Chance Snow Showers

    • 36
    • 61

    Partly Sunny

    • 39
    • 64

    Mostly Sunny

    • 41
    • 68

    Mostly Sunny

    • 42
    • 71

    Mostly Sunny

    • 44
    • 72

    Mostly Sunny

Today 16 May Ochoco-John Day Highlands

Mostly cloudy. Highs in the mid 40s to lower 50s. West wind 5 to 15 Mph with Gusts to around 30 Mph.

Tonight 16 May Ochoco-John Day Highlands

Mostly cloudy with a 50 percent chance of rain and mountain snow Showers. Snow level 4500 feet. Lows in the mid 20s to lower 30s. Northwest wind 5 to 15 Mph with Gusts to around 30 Mph.

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Collins Reservoir Temperature Statistics

May Temperature

Prineville Airport (47.8 miles)

  • Lowest 14 May, 2026

    26.6 °F

  • Average May

    59.8 °F

  • Highest 12 May, 2026

    87.8 °F

Climate (2021–Present)

Prineville Airport (47.8 miles)

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  • Average Low 2021–2026

    34.7 °F

  • Average 2021–2026

    49.8 °F

  • Average High 2021–2026

    63.2 °F
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