Great Falls Weather Forecast

    • 71
    • 91

    Sunny

    • 76
    • 98

    Hot

    • 75
    • 95

    Mostly Sunny

    • 74
    • 95

    Slight Chance Thunderstorms

    • 73
    • 94

    Chance Thunderstorms

    • 70
    • 88

    Chance Thunderstorms

Today 14 Jul Central and Southeast Montgomery

Sunny. Highs in the lower 90s. West Winds around 5 Mph.

Tonight 14 Jul Central and Southeast Montgomery

Clear. Lows in the lower 70s. Southwest Winds around 5 Mph.

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Great Falls Temperature Statistics

July Temperature

Washington/Dulles International Airport, DC (9.3 miles)

  • Lowest 10 July, 2026

    68.6 °F

  • Average July

    82.3 °F

  • Highest 4 July, 2026

    99.6 °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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