Marysville Weather Forecast

    • 47
    • 67

    Becoming Sunny

    • 46
    • 71

    Partly Sunny

    • 31
    • 59

    Rain/Snow

    • 25
    • 35

    Snow Likely

    • 23
    • 34

    Snow Likely

    • 23
    • 38

    Chance Snow

Today 20 Apr Upper Blackfoot and MacDonald Pass

Sunny. Highs 62 to 70. West Winds up to 10 Mph with Gusts to around 25 Mph.

Tonight 20 Apr Upper Blackfoot and MacDonald Pass

Partly cloudy. Highs 62 to 70. Lows 39 to 46. Southwest Winds up to 10 Mph with Gusts to around 25 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Marysville Temperature Statistics

April Temperature

Helena Regional Airport (17.4 miles)

  • Lowest 8 April, 2026

    27.6 °F

  • Average April

    46.2 °F

  • Highest 7 April, 2026

    69.7 °F

Climate (2021–Present)

Helena Regional Airport (17.4 miles)

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  • Average Low 2021–2026

    36.5 °F

  • Average 2021–2026

    48.1 °F

  • Average High 2021–2026

    60 °F
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