Ajax Lake Weather Forecast

    • 37
    • 52

    Increasing Clouds

    • 35
    • 53

    Rain

    • 22
    • 40

    Rain/Snow

    • 24
    • 38

    Partly Sunny

    • 25
    • 43

    Partly Sunny

    • 25
    • 43

    Chance Snow

Today 21 Oct Northwest Beaverhead County

Mostly sunny. A 20 percent chance of rain late in the morning. Highs 52 to 60. South Winds up to 10 Mph.

Tonight 21 Oct Northwest Beaverhead County

Mostly clear. Lows 32 to 40. South Winds up to 10 Mph.

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Ajax Lake Temperature Statistics

October Temperature

Salmon, Lemhi County Airport (16.2 miles)

  • Lowest 16 October, 2026

    25 °F

  • Average October

    48.6 °F

  • Highest 9 October, 2026

    82.9 °F

Climate (2021–2026)

Salmon, Lemhi County Airport (16.2 miles)

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  • Average Low 2021–2026

    33.1 °F

  • Average 2021–2026

    46.1 °F

  • Average High 2021–2026

    59.2 °F
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