Johnson Reservoir Weather Forecast

    • 39
    • 64

    Chance Rain Showers

    • 34
    • 60

    Mostly Sunny

    • 36
    • 63

    Mostly Sunny

    • 42
    • 70

    Mostly Sunny

    • 46
    • 75

    Partly Sunny

    • 45
    • 78

    Partly Sunny

Today 29 May Owyhee Mountains

Partly cloudy with scattered Showers and isolated Thunderstorms. Thunderstorms may produce gusty Winds. Chance of rain 30 percent. Highs 66 to 71.

Tonight 29 May Owyhee Mountains

Mostly cloudy with scattered rain Showers and isolated Thunderstorms in the Evening, then partly cloudy after midnight. Thunderstorms may produce gusty Winds in the evening. Chance of rain 30 percent. Lows 40 to 48. Breezy.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Johnson Reservoir Temperature Statistics

May Temperature

Mountain Home Air Force Base (46 miles)

  • Lowest 1 May, 2026

    38.6 °F

  • Average May

    64.1 °F

  • Highest 12 May, 2026

    97.6 °F

Climate (2021–Present)

Mountain Home Air Force Base (46 miles)

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  • Average Low 2021–2026

    40.1 °F

  • Average 2021–2026

    52.7 °F

  • Average High 2021–2026

    65.6 °F
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