Great Falls Weather Forecast

    • 39
    • 58

    Decreasing Clouds

    • 30
    • 60

    Partly Sunny

    • 41
    • 58

    Slight Chance Rain

    • 37
    • 65

    Chance Rain

    • 32
    • 54

    Chance Rain

    • 34
    • 55

    Mostly Cloudy

Today 16 Oct Cascade County below 5000ft

Patchy fog in the morning. Mostly cloudy with a 20 percent chance of rain in the Morning, then partly cloudy in the afternoon. Highs 55 to 60. West Winds up to 10 Mph.

Tonight 16 Oct Cascade County below 5000ft

Breezy. Mostly clear. Lows 35 to 40. Southwest Winds 10 to 15 Mph increasing to 15 to 25 Mph after midnight.

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Great Falls Temperature Statistics

October Temperature

Great Falls, Great Falls International Airport (3.7 miles)

  • Lowest 13 October, 2025

    26.1 °F

  • Average October

    49.1 °F

  • Highest 10 October, 2025

    78.1 °F

Climate (2020–Present)

Great Falls, Great Falls International Airport (3.7 miles)

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  • Average Low 2020–2025

    34 °F

  • Average 2020–2025

    46.4 °F

  • Average High 2020–2025

    58.3 °F
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