Tupper Lake Weather Forecast

    • 40
    • 62

    Gradual Clearing

    • 39
    • 62

    Rain Likely

    • 37
    • 54

    Rain Likely

    • 39
    • 60

    Partly Sunny

    • 39
    • 60

    Mostly Sunny

    • 41
    • 67

    Mostly Sunny

Today 12 Sep Butte/Blackfoot Region

Mostly cloudy. Patchy fog early in the morning. Highs in the 60s.

Tonight 12 Sep Butte/Blackfoot Region

Mostly cloudy. Lows in the mid 30s to lower 40s.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Tupper Lake Temperature Statistics

September Temperature

Helena Regional Airport (52.2 miles)

  • Lowest 9 September, 2026

    42.1 °F

  • Average September

    63.9 °F

  • Highest 10 September, 2026

    86 °F

Climate (2021–2026)

Helena Regional Airport (52.2 miles)

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  • Average Low 2021–2026

    36.4 °F

  • Average 2021–2026

    48 °F

  • Average High 2021–2026

    59.9 °F
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