Marysville Weather Forecast

    • 24
    • 37

    Increasing Clouds

    • 19
    • 29

    Decreasing Clouds

    • 25
    • 32

    Partly Sunny

    • 19
    • 31

    Mostly Cloudy

    • 21
    • 26

    Partly Sunny

    • 14
    • 32

    Mostly Cloudy

    • 3
    • 19

    Snow Likely

Today 17 Jan Upper Blackfoot and MacDonald Pass

Sunny. Highs 30 to 38. West Winds 10 to 15 Mph with Gusts to around 35 Mph.

Tonight 17 Jan Upper Blackfoot and MacDonald Pass

Mostly clear. Near steady temperature in the mid 20s. West Winds 5 to 10 Mph shifting to the north after midnight. Gusts up to 30 Mph.

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Marysville Temperature Statistics

January Temperature

Helena Regional Airport (17.4 miles)

  • Lowest 8 January, 2026

    19 °F

  • Average January

    38 °F

  • Highest 14 January, 2026

    57.9 °F

Climate (2021–Present)

Helena Regional Airport (17.4 miles)

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  • Average Low 2021–2026

    36.4 °F

  • Average 2021–2026

    47.8 °F

  • Average High 2021–2026

    59.6 °F
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