Lois Lake Weather Forecast

    • 52
    • 88

    Increasing Clouds

    • 49
    • 82

    Chance Rain

    • 46
    • 78

    Mostly Sunny

    • 47
    • 78

    Mostly Sunny

    • 50
    • 83

    Mostly Sunny

    • 52
    • 84

    Partly Sunny

Today 19 Aug Butte/Blackfoot Region

Mostly sunny. A 20 percent chance of rain in the afternoon. Highs in the mid 80s to lower 90s.

Tonight 19 Aug Butte/Blackfoot Region

Partly cloudy. A 20 percent chance of rain in the evening. Lows in the upper 40s to mid 50s.

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Lois Lake Temperature Statistics

August Temperature

Helena Regional Airport (23.6 miles)

  • Lowest 7 August, 2025

    49.6 °F

  • Average August

    70 °F

  • Highest 12 August, 2025

    95.6 °F

Climate (2020–Present)

Helena Regional Airport (23.6 miles)

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  • Average Low 2020–2025

    36 °F

  • Average 2020–2025

    47.5 °F

  • Average High 2020–2025

    59.4 °F
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