Rock Island Lakes Weather Forecast

    • 52
    • 76

    Patchy Smoke

    • 45
    • 80

    Breezy

    • 38
    • 69

    Sunny

    • 38
    • 62

    Sunny

    • 43
    • 68

    Mostly Sunny

    • 46
    • 74

    Mostly Sunny

Today 31 Jul Northwest Beaverhead County

Sunny. Patchy smoke through the day. Highs 77 to 87. West Winds up to 10 Mph.

Tonight 31 Jul Northwest Beaverhead County

Mostly clear. Patchy smoke. Lows 51 to 59. North Winds up to 10 Mph shifting to the southeast after midnight.

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Rock Island Lakes Temperature Statistics

July Temperature

Salmon, Lemhi County Airport (15.5 miles)

  • Lowest 2 July, 2026

    44.1 °F

  • Average July

    72.2 °F

  • Highest 25 July, 2026

    100 °F

Climate (2021–2026)

Salmon, Lemhi County Airport (15.5 miles)

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  • Average Low 2021–2026

    33.1 °F

  • Average 2021–2026

    46 °F

  • Average High 2021–2026

    59 °F
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