Grindstone Reservoir Weather Forecast

    • 52
    • 84

    Slight Chance Thunderstorms

    • 51
    • 86

    Slight Chance Thunderstorms

    • 46
    • 88

    Mostly Sunny

    • 48
    • 87

    Mostly Sunny

    • 50
    • 87

    Mostly Sunny

    • 53
    • 88

    Partly Sunny

    • 53
    • 87

    Mostly Cloudy

Today 14 Jul Ochoco-John Day Highlands

Partly cloudy. Highs in the lower 80s to lower 90s.

Tonight 14 Jul Ochoco-John Day Highlands

Mostly cloudy with a 20 percent chance of rain Showers. Lows in the 50s.

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Grindstone Reservoir Temperature Statistics

July Temperature

Burns Municipal Airport (46 miles)

  • Lowest 2 July, 2026

    37.7 °F

  • Average July

    67.9 °F

  • Highest 11 July, 2026

    96.7 °F

Climate (2021–2026)

Burns Municipal Airport (46 miles)

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  • Average Low 2021–2026

    32.1 °F

  • Average 2021–2026

    47.6 °F

  • Average High 2021–2026

    62.5 °F
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