Great Falls Weather Forecast

    • 36
    • 59

    Decreasing Clouds

    • 45
    • 72

    Mostly Sunny

    • 44
    • 73

    Partly Sunny

    • 35
    • 53

    Rain

    • 30
    • 48

    Slight Chance Snow

    • 27
    • 43

    Mostly Cloudy

Today 20 Oct Cascade County below 5000ft

Cooler. Mostly sunny. Highs in the upper 50s. Northwest Winds up to 5 Mph.

Tonight 20 Oct Cascade County below 5000ft

Partly cloudy. Lows in the mid 30s. East Winds up to 5 Mph shifting to the south with Gusts to around 20 Mph after midnight.

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Great Falls Temperature Statistics

October Temperature

Great Falls, Great Falls International Airport (3.7 miles)

  • Lowest 12 October, 2026

    29.6 °F

  • Average October

    52.3 °F

  • Highest 5 October, 2026

    85.6 °F

Climate (2021–2026)

Great Falls, Great Falls International Airport (3.7 miles)

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  • Average Low 2021–2026

    34.3 °F

  • Average 2021–2026

    46.9 °F

  • Average High 2021–2026

    59.1 °F
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