Grindstone Reservoir Weather Forecast

    • 34
    • 48

    Rain Showers

    • 41
    • 69

    Rain Showers Likely

    • 41
    • 71

    Rain Showers

    • 34
    • 62

    Rain Showers Likely

    • 32
    • 60

    Partly Sunny

    • 35
    • 63

    Mostly Sunny

Today 26 May Ochoco-John Day Highlands

Mostly cloudy with a 50 percent chance of rain and high mountain snow Showers. Highs in the upper 40s to mid 50s. North wind 5 to 15 Mph with Gusts to around 25 Mph.

Tonight 26 May Ochoco-John Day Highlands

A chance of rain Showers in the Evening, then rain Showers overnight. Lows in the lower 30s to lower 40s. North wind 5 to 15 Mph with Gusts to around 30 Mph. Chance of precipitation 90 percent. Rainfall Amounts less than a quarter of an inch.

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Grindstone Reservoir Temperature Statistics

May Temperature

Burns Municipal Airport (46 miles)

  • Lowest 14 May, 2026

    25.6 °F

  • Average May

    54.4 °F

  • Highest 12 May, 2026

    90.6 °F

Climate (2021–Present)

Burns Municipal Airport (46 miles)

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  • Average Low 2021–2026

    32.3 °F

  • Average 2021–2026

    47.9 °F

  • Average High 2021–2026

    62.7 °F
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