Gentian Lake Weather Forecast

    • 39
    • 47

    Rain Showers

    • 38
    • 43

    Rain

    • 41
    • 53

    Mostly Sunny

    • 43
    • 56

    Partly Sunny

    • 41
    • 56

    Partly Sunny

    • 42
    • 56

    Mostly Sunny

    • 43
    • 59

    Partly Sunny

Today 18 Sep Western Lemhi County

Partly cloudy. Highs in the 70s.

Tonight 18 Sep Western Lemhi County

Rain Showers likely and a slight chance of Thunderstorms in the Evening, then rain Showers likely after midnight. Chance of precipitation near 100 percent. Lows in the mid 40s to lower 50s.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Gentian Lake Temperature Statistics

September Temperature

Salmon, Lemhi County Airport (34.2 miles)

  • Lowest 15 September, 2026

    35.1 °F

  • Average September

    57.9 °F

  • Highest 10 September, 2026

    82.9 °F

Climate (2021–2026)

Salmon, Lemhi County Airport (34.2 miles)

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  • Average Low 2021–2026

    33.1 °F

  • Average 2021–2026

    46.1 °F

  • Average High 2021–2026

    59.1 °F
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