Great Falls Weather Forecast

    • 55
    • 71

    Increasing Clouds

    • 52
    • 74

    Rain Showers

    • 49
    • 64

    Partly Sunny

    • 54
    • 72

    Partly Sunny

    • 62
    • 84

    Partly Sunny

    • 65
    • 88

    Partly Sunny

Today 12 May Central and Southeast Montgomery

Sunny. Highs around 70. North Winds around 5 Mph, becoming southwest this afternoon.

Tonight 12 May Central and Southeast Montgomery

Partly cloudy. Lows in the mid 50s. South Winds 5 to 10 Mph. Gusts up to 25 Mph after midnight.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Great Falls Temperature Statistics

May Temperature

Washington/Dulles International Airport, DC (9.3 miles)

  • Lowest 8 May, 2026

    37.7 °F

  • Average May

    59.6 °F

  • Highest 5 May, 2026

    85.6 °F

Climate (2021–Present)

Washington/Dulles International Airport, DC (9.3 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    47.5 °F

  • Average 2021–2026

    58.2 °F

  • Average High 2021–2026

    68.6 °F
Get WillyWeather+ to remove ads