Mays Reservoir Weather Forecast

    • 42
    • 61

    Chance Rain Showers

    • 46
    • 62

    Rain Showers

    • 39
    • 60

    Rain Showers

    • 37
    • 55

    Slight Chance Thunderstorms

    • 43
    • 67

    Partly Sunny

    • 41
    • 67

    Mostly Sunny

    • 43
    • 71

    Partly Sunny

Today 15 May John Day Basin

Mostly cloudy. Highs in the upper 50s to mid 60s. West wind 5 to 10 Mph. Gusts up to 20 Mph in the afternoon.

Tonight 15 May John Day Basin

Rain Showers. Lows in the lower 40s. Northwest wind 5 to 10 Mph with Gusts to around 20 Mph in the Evening, becoming light. Chance of precipitation 90 percent. Rainfall Amounts less than a tenth of an inch.

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  • Temperature Real-Time

Mays Reservoir Temperature Statistics

May Temperature

Prineville Airport (37.3 miles)

  • Lowest 4 May, 2025

    26.6 °F

  • Average May

    52.2 °F

  • Highest 9 May, 2025

    80.6 °F

Climate (2020–Present)

Prineville Airport (37.3 miles)

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  • Average Low 2020–2025

    34.1 °F

  • Average 2020–2025

    49.2 °F

  • Average High 2020–2025

    62.6 °F
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