Grindstone Reservoir Weather Forecast

    • 41
    • 74

    Increasing Clouds

    • 44
    • 80

    Partly Sunny

    • 30
    • 58

    Chance Rain Showers

    • 34
    • 57

    Mostly Cloudy

    • 32
    • 59

    Partly Sunny

    • 34
    • 60

    Mostly Sunny

Today 23 Sep Ochoco-John Day Highlands

Partly cloudy. Highs in the lower to mid 70s.

Tonight 23 Sep Ochoco-John Day Highlands

Mostly cloudy. Lows in the upper 30s to mid 40s.

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Grindstone Reservoir Temperature Statistics

September Temperature

Burns Municipal Airport (46 miles)

  • Lowest 14 September, 2026

    29.6 °F

  • Average September

    55 °F

  • Highest 10 September, 2026

    87.7 °F

Climate (2021–2026)

Burns Municipal Airport (46 miles)

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  • Average Low 2021–2026

    32 °F

  • Average 2021–2026

    47.5 °F

  • Average High 2021–2026

    62.5 °F
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