Tupper Lake Weather Forecast

    • 38
    • 64

    Increasing Clouds

    • 41
    • 69

    Partly Sunny

    • 45
    • 74

    Mostly Sunny

    • 46
    • 79

    Chance Rain

    • 41
    • 65

    Rain Showers Likely

    • 43
    • 65

    Slight Chance Thunderstorms

    • 45
    • 71

    Chance Rain Showers

Today 22 May Butte/Blackfoot Region

Partly cloudy. Widespread frost early in the morning. Highs in the upper 50s to mid 60s.

Tonight 22 May Butte/Blackfoot Region

Mostly cloudy with a 20 percent chance of rain in the Evening, then mostly clear after midnight. Lows in the 30s.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Tupper Lake Temperature Statistics

May Temperature

Helena Regional Airport (52.2 miles)

  • Lowest 6 May, 2026

    27.6 °F

  • Average May

    53.5 °F

  • Highest 13 May, 2026

    84.7 °F

Climate (2021–Present)

Helena Regional Airport (52.2 miles)

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  • Average Low 2021–2026

    36.5 °F

  • Average 2021–2026

    48.1 °F

  • Average High 2021–2026

    60.1 °F
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