Great Falls Weather Forecast

    • 49
    • 67

    Rain Showers

    • 42
    • 64

    Mostly Sunny

    • 43
    • 63

    Chance Rain Showers

    • 40
    • 58

    Slight Chance Rain Showers

    • 43
    • 62

    Mostly Sunny

    • 47
    • 66

    Slight Chance Rain Showers

Today 29 Apr Central and Southeast Montgomery

Cloudy. A chance of Showers in the Morning, then Showers with a chance of Thunderstorms in the afternoon. Highs in the upper 60s. Southeast Winds 5 to 10 Mph. Chance of rain 90 percent.

Tonight 29 Apr Central and Southeast Montgomery

Patchy fog in the evening. Cloudy with Showers with a chance of Thunderstorms in the Evening, then mostly clear after midnight. Lows in the upper 40s. South Winds 5 to 10 Mph, becoming northwest 10 to 15 Mph after midnight. Chance of rain 90 percent.

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Great Falls Temperature Statistics

April Temperature

Washington/Dulles International Airport, DC (9.3 miles)

  • Lowest 8 April, 2026

    32.6 °F

  • Average April

    63 °F

  • Highest 16 April, 2026

    92.6 °F

Climate (2021–Present)

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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