Martin Lake Weather Forecast

    • 50
    • 71

    Slight Chance Rain

    • 46
    • 66

    Chance Rain

    • 44
    • 61

    Mostly Sunny

    • 46
    • 62

    Mostly Sunny

    • 50
    • 66

    Mostly Sunny

    • 49
    • 67

    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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Martin Lake Temperature Statistics

August Temperature

Butte, Bert Mooney Airport (36 miles)

  • Lowest 9 August, 2025

    39.7 °F

  • Average August

    62.9 °F

  • Highest 12 August, 2025

    87.7 °F

Climate (2020–Present)

Butte, Bert Mooney Airport (36 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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