Hirschy Reservoir Weather Forecast

    • 20
    • 39

    Partly Sunny

    • 22
    • 50

    Mostly Sunny

    • 25
    • 54

    Partly Sunny

    • 26
    • 51

    Partly Sunny

    • 29
    • 53

    Rain/Snow Likely

    • 22
    • 44

    Rain/Snow Likely

Today 20 Oct Northwest Beaverhead County

Mostly cloudy in the morning then clearing. Highs 30 to 40. West Winds 10 to 20 Mph with Gusts to around 35 Mph.

Tonight 20 Oct Northwest Beaverhead County

Mostly clear. Lows 20 to 25. Southwest Winds up to 10 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Hirschy Reservoir Temperature Statistics

October Temperature

Salmon, Lemhi County Airport (31.7 miles)

  • Lowest 6 October, 2025

    27 °F

  • Average October

    48.6 °F

  • Highest 10 October, 2025

    78.1 °F

Climate (2020–Present)

Salmon, Lemhi County Airport (31.7 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2020–2025

    32.3 °F

  • Average 2020–2025

    45.3 °F

  • Average High 2020–2025

    58.3 °F
Get WillyWeather+ to remove ads