Rock Island Lakes Weather Forecast

    • 18
    • 28

    Increasing Clouds

    • 25
    • 31

    Snow

    • 30
    • 33

    Snow

    • 26
    • 35

    Snow

    • 13
    • 30

    Snow Likely

    • 17
    • 31

    Mostly Sunny

Today 21 Feb Northwest Beaverhead County

Sunny late in the morning then becoming partly cloudy. Highs 30 to 35. Southwest Winds up to 10 Mph.

Tonight 21 Feb Northwest Beaverhead County

Partly cloudy in the evening then becoming mostly cloudy. Lows 15 to 20. Southwest Winds up to 10 Mph.

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Rock Island Lakes Temperature Statistics

February Temperature

Salmon, Lemhi County Airport (15.5 miles)

  • Lowest 13 February, 2025

    -17.2 °F

  • Average February

    22.8 °F

  • Highest 4 February, 2025

    49.6 °F

Climate (2020–Present)

Salmon, Lemhi County Airport (15.5 miles)

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  • Average Low 2020–2025

    32.1 °F

  • Average 2020–2025

    45.1 °F

  • Average High 2020–2025

    57.9 °F
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