Hirschy Reservoir Weather Forecast

    • 13
    • 31

    Mostly Sunny

    • 8
    • 32

    Partly Sunny

    • 10
    • 30

    Partly Sunny

    • 14
    • 33

    Mostly Cloudy

    • 11
    • 30

    Chance Snow

    • 10
    • 29

    Chance Snow

Today 19 Jan Northwest Beaverhead County

Sunny. Highs 27 to 33. West Winds up to 10 Mph. Gusts up to 30 Mph in the afternoon.

Tonight 19 Jan Northwest Beaverhead County

Mostly clear. Lows 13 to 19. West Winds 5 to 10 Mph with Gusts to around 35 Mph.

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Hirschy Reservoir Temperature Statistics

January Temperature

Salmon, Lemhi County Airport (31.7 miles)

  • Lowest 11 January, 2026

    14 °F

  • Average January

    28.5 °F

  • Highest 4 January, 2026

    48 °F

Climate (2021–Present)

Salmon, Lemhi County Airport (31.7 miles)

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  • Average Low 2021–2026

    32.7 °F

  • Average 2021–2026

    45.8 °F

  • Average High 2021–2026

    58.7 °F
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