Great Falls Weather Forecast

    • 40
    • 64

    Chance Rain Showers

    • 38
    • 58

    Rain Showers

    • 37
    • 60

    Rain Showers Likely

    • 42
    • 65

    Slight Chance Rain Showers

    • 40
    • 62

    Rain Showers Likely

    • 40
    • 55

    Rain Showers Likely

Today 18 May Cascade County below 5000ft

Breezy. Sunny in the morning then becoming partly cloudy. Highs 60 to 65. West Winds 15 to 25 Mph.

Tonight 18 May Cascade County below 5000ft

Partly cloudy in the Evening, then mostly cloudy with a 20 percent chance of rain Showers after midnight. Lows around 40. Northwest Winds 5 to 15 Mph shifting to the southwest after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Great Falls Temperature Statistics

May Temperature

Great Falls, Great Falls International Airport (3.7 miles)

  • Lowest 1 May, 2024

    21.8 °F

  • Average May

    48.8 °F

  • Highest 11 May, 2024

    78.7 °F

Climate (2019–Present)

Great Falls, Great Falls International Airport (3.7 miles)

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  • Average Low 2019–2024

    33.8 °F

  • Average 2019–2024

    45.7 °F

  • Average High 2019–2024

    57.3 °F
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