Reservoir Lake Weather Forecast

    • 21
    • 28

    Snow

    • 23
    • 31

    Snow

    • 17
    • 30

    Snow Likely

    • 23
    • 30

    Chance Snow

    • 25
    • 34

    Snow Likely

    • 29
    • 38

    Snow Likely

Today 4 Dec Northwest Beaverhead County

Mostly cloudy. Slight chance of snow late in the Morning, then chance of snow in the afternoon. Highs 23 to 31. West Winds 5 to 15 Mph with Gusts to around 35 Mph. Chance of snow 50 percent.

Tonight 4 Dec Northwest Beaverhead County

Snow in the Evening, then snow likely after midnight. Snow accumulation up to 8 Inches. Near steady temperature in the lower 20s. West Winds 5 to 15 Mph with Gusts to around 35 Mph. Chance of snow near 100 percent.

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  • Temperature Real-Time

Reservoir Lake Temperature Statistics

December Temperature

Salmon, Lemhi County Airport (20.5 miles)

  • Lowest 1 December, 2025

    12 °F

  • Average December

    25.8 °F

  • Highest 2 December, 2025

    33.1 °F

Climate (2020–Present)

Salmon, Lemhi County Airport (20.5 miles)

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  • Average Low 2020–2025

    32.5 °F

  • Average 2020–2025

    45.5 °F

  • Average High 2020–2025

    58.5 °F
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