Great Falls Weather Forecast

    • 68
    • 87

    Becoming Sunny

    • 70
    • 89

    Mostly Sunny

    • 76
    • 97

    Hot

    • 78
    • 100

    Hot

    • 77
    • 102

    Chance Thunderstorms

    • 75
    • 100

    Rain Showers Likely

    • 74
    • 95

    Chance Thunderstorms

Today 29 Jun Central and Southeast Montgomery

Partly sunny. Highs in the upper 80s. Southeast Winds around 5 Mph.

Tonight 29 Jun Central and Southeast Montgomery

Partly cloudy in the Evening, then becoming mostly clear. Lows in the upper 60s. South Winds around 5 Mph.

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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

    47.6 °F

  • Average 2021–2026

    58.2 °F

  • Average High 2021–2026

    68.6 °F
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