Johnson Reservoir Weather Forecast

    • 16
    • 31

    Mostly Sunny

    • 21
    • 36

    Mostly Cloudy

    • 21
    • 40

    Partly Sunny

    • 26
    • 42

    Partly Sunny

    • 27
    • 46

    Mostly Cloudy

    • 26
    • 46

    Mostly Sunny

    • 24
    • 47

    Mostly Sunny

Today 9 Jan Owyhee Mountains

Patchy fog this morning. Mostly sunny. Highs 35 to 40.

Tonight 9 Jan Owyhee Mountains

Mostly clear. Lows 20 to 27.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Johnson Reservoir Temperature Statistics

January Temperature

Mountain Home Air Force Base (46 miles)

  • Lowest 5 January, 2026

    31.8 °F

  • Average January

    41.7 °F

  • Highest 2 January, 2026

    53.1 °F

Climate (2021–Present)

Mountain Home Air Force Base (46 miles)

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  • Average Low 2021–2026

    40 °F

  • Average 2021–2026

    52.5 °F

  • Average High 2021–2026

    65.3 °F
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