Rock Island Lakes Weather Forecast

    • 30
    • 41

    Chance Rain/Snow

    • 30
    • 35

    Snow

    • 26
    • 34

    Snow

    • 22
    • 32

    Partly Sunny

    • 23
    • 34

    Mostly Cloudy

    • 24
    • 35

    Partly Sunny

    • 25
    • 36

    Partly Sunny

Today 30 Oct Northwest Beaverhead County

Partly sunny. A 20 percent chance of snow in the afternoon. Highs 35 to 41.

Tonight 30 Oct Northwest Beaverhead County

Mostly cloudy. Patchy dense fog through the night. Chance of snow early in the evening. Chance of rain and slight chance of drizzle in the evening. Slight chance of light freezing drizzle through the night. Lows 28 to 34. South Winds up to 10 Mph. Chance of precipitation 50 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Rock Island Lakes Temperature Statistics

October Temperature

Salmon, Lemhi County Airport (15.5 miles)

  • Lowest 16 October, 2026

    25 °F

  • Average October

    47.2 °F

  • Highest 9 October, 2026

    82.9 °F

Climate (2021–2026)

Salmon, Lemhi County Airport (15.5 miles)

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

  • Average Low 2021–2026

    33.1 °F

  • Average 2021–2026

    46 °F

  • Average High 2021–2026

    59.2 °F
Get WillyWeather+ to remove ads