Stoyanoff Lake Weather Forecast

    • 39
    • 62

    Chance Thunderstorms

    • 45
    • 69

    Increasing Clouds

    • 45
    • 71

    Partly Sunny

    • 46
    • 72

    Rain Showers Likely

    • 46
    • 75

    Rain Showers Likely

    • 40
    • 62

    Rain Showers

    • 38
    • 54

    Rain Showers Likely

Today 22 Jun Meagher County Valleys

Partly sunny with a 50 percent chance of Thunderstorms. Highs in the mid 60s. North Winds 5 to 15 Mph with Gusts to around 30 Mph.

Tonight 22 Jun Meagher County Valleys

Partly cloudy. A 20 percent chance of Thunderstorms early in the evening. Patchy fog late in the night. Lows in the upper 30s. North Winds up to 10 Mph. Gusts up to 30 Mph in the evening.

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  • Temperature Real-Time

Stoyanoff Lake Temperature Statistics

June Temperature

Helena Regional Airport (34.8 miles)

  • Lowest 8 June, 2026

    34.6 °F

  • Average June

    59.6 °F

  • Highest 16 June, 2026

    86.6 °F

Climate (2021–2026)

Helena Regional Airport (34.8 miles)

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  • Average Low 2021–2026

    36.5 °F

  • Average 2021–2026

    48.1 °F

  • Average High 2021–2026

    60 °F
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