Great Falls Weather Forecast

    • 67
    • 89

    Rain Showers

    • 61
    • 79

    Chance Rain Showers

    • 64
    • 82

    Mostly Sunny

    • 68
    • 88

    Chance Thunderstorms

    • 69
    • 89

    Rain Showers Likely

    • 68
    • 86

    Chance Thunderstorms

    • 69
    • 88

    Partly Sunny

Today 22 Jun Central and Southeast Montgomery

Showers with a chance of Thunderstorms. Some Thunderstorms may be severe with damaging Winds. Locally heavy rainfall possible. Highs in the upper 80s. Southwest Winds around 10 Mph with Gusts up to 20 Mph. Chance of rain near 100 percent.

Tonight 22 Jun Central and Southeast Montgomery

Mostly cloudy. Showers with a chance of Thunderstorms in the Evening, then a chance of Showers and scattered Thunderstorms after midnight. Some Thunderstorms may be severe with damaging Winds in the evening. Lows in the mid 60s. Southwest Winds 5 to 10 Mph. Chance of rain 90 percent.

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Great Falls Temperature Statistics

June Temperature

Washington/Dulles International Airport, DC (9.3 miles)

  • Lowest 3 June, 2026

    50.6 °F

  • Average June

    74.3 °F

  • Highest 11 June, 2026

    94.6 °F

Climate (2021–2026)

Washington/Dulles International Airport, DC (9.3 miles)

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  • Average Low 2021–2026

    47.5 °F

  • Average 2021–2026

    58.2 °F

  • Average High 2021–2026

    68.6 °F
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