Mountain Home Weather Forecast

    • 51
    • 73

    Chance Thunderstorms

    • 51
    • 76

    Decreasing Clouds

    • 53
    • 81

    Mostly Sunny

    • 55
    • 84

    Partly Sunny

    • 55
    • 84

    Mostly Sunny

    • 57
    • 86

    Mostly Sunny

    • 60
    • 88

    Mostly Sunny

Today 18 Sep Upper Treasure Valley

Partly cloudy. Lows 54 to 61. Highs 84 to 89. Breezy.

Tonight 18 Sep Upper Treasure Valley

Mostly cloudy with a chance of Showers with a slight chance of Thunderstorms. Patchy smoke this evening. Areas of fog after midnight. Chance of rain 30 percent. Lows 48 to 54. Northwest Winds 10 to 15 Mph. Gusts to 25 Mph this evening.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Mountain Home Temperature Statistics

September Temperature

Mountain Home Air Force Base (10.6 miles)

  • Lowest 15 September, 2026

    40.8 °F

  • Average September

    64.1 °F

  • Highest 1 September, 2026

    91.7 °F

Climate (2021–2026)

Mountain Home Air Force Base (10.6 miles)

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  • Average Low 2021–2026

    40 °F

  • Average 2021–2026

    52.6 °F

  • Average High 2021–2026

    65.5 °F
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