Johnson Lake Weather Forecast

    • 24
    • 32

    Increasing Clouds

    • 22
    • 38

    Chance Snow Showers

    • 29
    • 38

    Partly Sunny

    • 23
    • 40

    Snow Showers

    • 19
    • 26

    Chance Snow Showers

    • 22
    • 31

    Partly Sunny

Today 16 Oct Butte/Blackfoot Region

Mostly cloudy until late afternoon then clearing. Patchy fog early in the morning. Highs in the 40s.

Tonight 16 Oct Butte/Blackfoot Region

Mostly clear. Lows in the mid 20s to lower 30s. West Winds to 15 Mph with Gusts to around 30 Mph.

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Johnson Lake Temperature Statistics

October Temperature

Butte, Bert Mooney Airport (47.2 miles)

  • Lowest 6 October, 2025

    19.9 °F

  • Average October

    44.5 °F

  • Highest 9 October, 2025

    71.1 °F

Climate (2020–Present)

Butte, Bert Mooney Airport (47.2 miles)

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  • Average Low 2020–2025

    27.7 °F

  • Average 2020–2025

    41.6 °F

  • Average High 2020–2025

    55 °F
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