John Hoffman Reservoir Weather Forecast

    • 56
    • 77

    Sunny

    • 57
    • 81

    Sunny

    • 60
    • 85

    Partly Sunny

    • 60
    • 85

    Mostly Cloudy

    • 58
    • 82

    Mostly Sunny

    • 54
    • 78

    Mostly Sunny

    • 57
    • 81

    Mostly Sunny

Today 16 Sep Upper Treasure Valley

Areas of fog this morning. Sunny. Highs 77 to 82. Southeast Winds up to 10 Mph.

Tonight 16 Sep Upper Treasure Valley

Mostly clear. Lows 46 to 54. Light Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

John Hoffman Reservoir Temperature Statistics

September Temperature

Mountain Home Air Force Base (16.8 miles)

  • Lowest 12 September, 2025

    46.8 °F

  • Average September

    70.7 °F

  • Highest 3 September, 2025

    97.3 °F

Climate (2020–Present)

Mountain Home Air Force Base (16.8 miles)

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  • Average Low 2020–2025

    39.6 °F

  • Average 2020–2025

    52.2 °F

  • Average High 2020–2025

    65 °F
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