Gravelly Range Lake Weather Forecast

    • 51
    • 75

    Increasing Clouds

    • 50
    • 75

    Partly Sunny

    • 51
    • 76

    Mostly Sunny

    • 44
    • 67

    Slight Chance Rain

    • 46
    • 66

    Mostly Sunny

    • 49
    • 74

    Mostly Sunny

Today 18 Sep Gates of the Mountains

Sunny. Highs 75 to 80. South Winds up to 10 Mph shifting to the north in the afternoon.

Tonight 18 Sep Gates of the Mountains

Mostly clear. Lows around 50. Northeast Winds up to 10 Mph shifting to the west after midnight.

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Gravelly Range Lake Temperature Statistics

September Temperature

Helena Regional Airport (23.6 miles)

  • Lowest 5 September, 2025

    46 °F

  • Average September

    64.9 °F

  • Highest 3 September, 2025

    91.9 °F

Climate (2020–Present)

Helena Regional Airport (23.6 miles)

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  • Average Low 2020–2025

    36.1 °F

  • Average 2020–2025

    47.5 °F

  • Average High 2020–2025

    59.4 °F
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