Lost Trail Powder Mountain Weather Forecast

    • 49
    • 75

    Mostly Sunny

    • 51
    • 77

    Mostly Sunny

    • 50
    • 78

    Partly Sunny

    • 49
    • 77

    Mostly Sunny

    • 43
    • 69

    Partly Sunny

    • 48
    • 73

    Mostly Sunny

Today 17 Sep Bitterroot/Sapphire Mountains

Mostly sunny. Highs in the upper 60s to mid 70s.

Tonight 17 Sep Bitterroot/Sapphire Mountains

Mostly clear. Lows in the 40s.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lost Trail Powder Mountain Temperature Statistics

September Temperature

Salmon, Lemhi County Airport (54.7 miles)

  • Lowest 12 September, 2025

    39.9 °F

  • Average September

    60.2 °F

  • Highest 3 September, 2025

    90 °F

Climate (2020–Present)

Salmon, Lemhi County Airport (54.7 miles)

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  • Average Low 2020–2025

    32.3 °F

  • Average 2020–2025

    45.3 °F

  • Average High 2020–2025

    58.3 °F
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