Mays Reservoir Weather Forecast

    • 55
    • 85

    Increasing Clouds

    • 50
    • 81

    Chance Rain Showers

    • 49
    • 68

    Rain Showers

    • 44
    • 64

    Chance Rain Showers

    • 46
    • 65

    Chance Rain Showers

    • 49
    • 70

    Partly Sunny

Today 31 Aug John Day Basin

Sunny. Highs in the mid 80s to lower 90s. Northeast wind 5 to 10 Mph.

Tonight 31 Aug John Day Basin

Mostly cloudy. Lows in the 50s. North wind 5 to 10 Mph with Gusts to around 20 Mph in the Evening, becoming light.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Mays Reservoir Temperature Statistics

August Temperature

Prineville Airport (37.3 miles)

  • Lowest 3 August, 2026

    39.2 °F

  • Average August

    69.2 °F

  • Highest 6 August, 2026

    96.8 °F

Climate (2021–2026)

Prineville Airport (37.3 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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