Stoyanoff Lake Weather Forecast

    • 36
    • 46

    Rain

    • 22
    • 45

    Rain

    • 31
    • 39

    Rain/Snow

    • 22
    • 43

    Snow

    • 19
    • 35

    Slight Chance Snow

    • 25
    • 38

    Chance Rain/Snow

    • 25
    • 42

    Slight Chance Rain/Snow

Today 16 Dec Meagher County Valleys

Windy. Mostly sunny. Highs in the upper 40s. West Winds 15 to 30 Mph with Gusts to around 55 Mph.

Tonight 16 Dec Meagher County Valleys

Windy. Mostly cloudy then becoming partly cloudy late in the evening then becoming mostly cloudy. A 20 percent chance of rain and snow late in the night. Lows in the lower 30s. Southwest Winds 15 to 30 Mph. Gusts up to 55 Mph increasing to 70 Mph after midnight.

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Stoyanoff Lake Temperature Statistics

December Temperature

Helena Regional Airport (34.8 miles)

  • Lowest 1 December, 2025

    3 °F

  • Average December

    34.8 °F

  • Highest 10 December, 2025

    61 °F

Climate (2020–Present)

Helena Regional Airport (34.8 miles)

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  • Average Low 2020–2025

    36.3 °F

  • Average 2020–2025

    47.7 °F

  • Average High 2020–2025

    59.5 °F
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