Great Falls Weather Forecast

    • 53
    • 84

    Partly Sunny

    • 58
    • 91

    Partly Sunny

    • 57
    • 95

    Chance Rain Showers

    • 55
    • 89

    Partly Sunny

    • 50
    • 84

    Chance Rain Showers

    • 47
    • 73

    Slight Chance Rain Showers

Today 25 Aug Cascade County below 5000ft

Sunny. Highs in the lower 80s. Northeast Winds up to 10 Mph.

Tonight 25 Aug Cascade County below 5000ft

Mostly clear. Lows in the lower 50s. East Winds 5 to 15 Mph shifting to the south after midnight.

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Great Falls Temperature Statistics

August Temperature

Great Falls, Great Falls International Airport (3.7 miles)

  • Lowest 4 August, 2026

    38.6 °F

  • Average August

    67.1 °F

  • Highest 1 August, 2026

    102.7 °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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