Great Falls International Airport Weather Forecast

    • 34
    • 49

    Increasing Clouds

    • 34
    • 44

    Rain

    • 32
    • 52

    Mostly Sunny

    • 32
    • 56

    Partly Sunny

    • 32
    • 52

    Partly Sunny

    • 33
    • 53

    Mostly Cloudy

Today 31 Oct Cascade County below 5000ft

Mostly cloudy until late afternoon then becoming mostly sunny. Slight chance of light freezing drizzle early in the morning. Areas of dense fog early in the Morning, then patchy dense fog late in the morning. Highs in the upper 40s. Southeast Winds up to 5 Mph.

Tonight 31 Oct Cascade County below 5000ft

Mostly cloudy. Patchy dense fog through the night. Lows in the mid 30s. East Winds up to 5 Mph.

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  • Temperature Forecast NOAA

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Great Falls International Airport Temperature Statistics

October Temperature

Great Falls, Great Falls International Airport (0.6 miles)

  • Lowest 25 October, 2026

    20.6 °F

  • Average October

    48.7 °F

  • Highest 5 October, 2026

    85.6 °F

Climate (2021–2026)

Great Falls, Great Falls International Airport (0.6 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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