Mystic Lake Weather Forecast

    • 36
    • 51

    Mostly Sunny

    • 34
    • 52

    Rain

    • 23
    • 39

    Rain/Snow

    • 25
    • 36

    Partly Sunny

    • 25
    • 41

    Partly Sunny

    • 26
    • 40

    Chance Snow

Today 21 Oct Northwest Beaverhead County

Sunny. Highs 52 to 60. Southwest Winds 5 to 10 Mph.

Tonight 21 Oct Northwest Beaverhead County

Partly cloudy. Lows 32 to 40. South Winds up to 10 Mph.

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Mystic Lake Temperature Statistics

October Temperature

Butte, Bert Mooney Airport (51 miles)

  • Lowest 16 October, 2026

    23.6 °F

  • Average October

    46.3 °F

  • Highest 5 October, 2026

    80.7 °F

Climate (2021–2026)

Butte, Bert Mooney Airport (51 miles)

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  • Average Low 2021–2026

    28.5 °F

  • Average 2021–2026

    42.3 °F

  • Average High 2021–2026

    55.8 °F
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