Heart Butte Reservoir State Game Management Area Weather Forecast

    • 46
    • 71

    Mostly Sunny

    • 46
    • 70

    Mostly Sunny

    • 48
    • 73

    Mostly Sunny

    • 54
    • 79

    Mostly Sunny

    • 55
    • 82

    Mostly Sunny

    • 56
    • 80

    Partly Sunny

Today 23 Aug Grant

Mostly clear. Highs in the lower 70s. Northwest Winds around 5 Mph, increasing to 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 23 Aug Grant

Mostly clear. Lows in the upper 40s. North Winds 5 to 10 Mph.

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Heart Butte Reservoir State Game Management Area Temperature Statistics

August Temperature

Glen Ullin Regional Airport (14.9 miles)

  • Lowest 12 August, 2025

    48.2 °F

  • Average August

    69.6 °F

  • Highest 20 August, 2025

    95 °F

Climate (2020–Present)

Glen Ullin Regional Airport (14.9 miles)

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  • Average Low 2020–2025

    29.7 °F

  • Average 2020–2025

    43 °F

  • Average High 2020–2025

    55.2 °F
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