Jack Mountain Weather Forecast

    • 29
    • 36

    Breezy

    • 28
    • 35

    Mostly Cloudy

    • 24
    • 38

    Mostly Sunny

    • 14
    • 32

    Mostly Sunny

    • 17
    • 27

    Partly Sunny

    • 19
    • 32

    Mostly Sunny

    • 17
    • 31

    Partly Sunny

Today 12 Jan Elkhorn and Boulder Mountains

Partly sunny. Highs 39 to 47. Southwest Winds 5 to 15 Mph with Gusts to around 35 Mph.

Tonight 12 Jan Elkhorn and Boulder Mountains

Mostly cloudy. Lows 32 to 38. Southwest Winds 10 to 15 Mph with Gusts to around 40 Mph.

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Jack Mountain Temperature Statistics

January Temperature

Helena Regional Airport (23 miles)

  • Lowest 8 January, 2026

    19 °F

  • Average January

    35.6 °F

  • Highest 3 January, 2026

    55 °F

Climate (2021–Present)

Helena Regional Airport (23 miles)

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  • Average Low 2021–2026

    36.3 °F

  • Average 2021–2026

    47.7 °F

  • Average High 2021–2026

    59.6 °F
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