Mystic Lake Weather Forecast

    • 53
    • 72

    Chance Thunderstorms

    • 51
    • 71

    Chance Thunderstorms

    • 53
    • 71

    Chance Thunderstorms

    • 53
    • 75

    Mostly Sunny

    • 52
    • 76

    Mostly Sunny

    • 50
    • 74

    Mostly Sunny

Today 21 Jul Northwest Beaverhead County

Mostly cloudy. Chance of Showers and slight chance of Thunderstorms early in the Afternoon, then chance of Thunderstorms late in the afternoon. Patchy smoke through the day. Highs 73 to 83. West Winds up to 10 Mph. Chance of precipitation 50 percent.

Tonight 21 Jul Northwest Beaverhead County

Mostly cloudy in the evening then becoming partly cloudy. A 20 percent chance of Thunderstorms. Lows 51 to 59. Northwest Winds up to 10 Mph shifting to the southwest after midnight.

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Mystic Lake Temperature Statistics

July Temperature

Butte, Bert Mooney Airport (51 miles)

  • Lowest 2 July, 2026

    40.6 °F

  • Average July

    66.6 °F

  • Highest 11 July, 2026

    95.6 °F

Climate (2021–2026)

Butte, Bert Mooney Airport (51 miles)

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  • Average Low 2021–2026

    28.4 °F

  • Average 2021–2026

    42.2 °F

  • Average High 2021–2026

    55.6 °F
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