Tupper Lake Weather Forecast

    • 47
    • 74

    Chance Thunderstorms

    • 48
    • 77

    Partly Sunny

    • 49
    • 77

    Chance Rain

    • 46
    • 74

    Chance Thunderstorms

    • 48
    • 76

    Mostly Sunny

    • 49
    • 78

    Mostly Sunny

Today 15 Aug Butte/Blackfoot Region

Partly cloudy. Areas of fog in the morning. A 50 percent chance of Showers and Thunderstorms in the afternoon. Highs in the upper 60s to mid 70s.

Tonight 15 Aug Butte/Blackfoot Region

Mostly cloudy with a 50 percent chance of Showers and Thunderstorms in the Evening, then partly cloudy after midnight. Areas of fog after midnight. Lows in the upper 30s to mid 40s.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Tupper Lake Temperature Statistics

August Temperature

Helena Regional Airport (52.2 miles)

  • Lowest 4 August, 2026

    45.6 °F

  • Average August

    70.4 °F

  • Highest 1 August, 2026

    103.6 °F

Climate (2021–2026)

Helena Regional Airport (52.2 miles)

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  • Average Low 2021–2026

    36.3 °F

  • Average 2021–2026

    47.9 °F

  • Average High 2021–2026

    59.9 °F
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