Salmon Weather Forecast

    • 42
    • 74

    Mostly Sunny

    • 43
    • 78

    Becoming Sunny

    • 44
    • 82

    Mostly Sunny

    • 46
    • 82

    Partly Sunny

    • 44
    • 79

    Partly Sunny

    • 41
    • 74

    Mostly Sunny

    • 43
    • 77

    Mostly Sunny

Today 16 Sep Eastern Lemhi County

Warmer. Mostly sunny. Highs 54 to 68. Northeast Winds up to 10 Mph with Gusts to around 25 Mph.

Tonight 16 Sep Eastern Lemhi County

Mostly clear. Lows in the upper 30s to mid 40s.

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Salmon Temperature Statistics

September Temperature

Salmon, Lemhi County Airport (3.7 miles)

  • Lowest 12 September, 2025

    39.9 °F

  • Average September

    60.7 °F

  • Highest 3 September, 2025

    90 °F

Climate (2020–Present)

Salmon, Lemhi County Airport (3.7 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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