Mount Vernon District Park Weather Forecast

    • 73
    • 91

    Rain Showers Likely

    • 66
    • 84

    Slight Chance Thunderstorms

    • 63
    • 82

    Mostly Sunny

    • 62
    • 81

    Mostly Sunny

    • 64
    • 84

    Partly Sunny

    • 71
    • 87

    Partly Sunny

Today 4 Sep Fairfax

Sunny in the Morning, then partly sunny with a chance of Showers and Thunderstorms in the afternoon. Hot with Highs in the lower 90s. Northwest Winds 5 to 10 Mph. Chance of rain 50 percent.

Tonight 4 Sep Fairfax

Mostly cloudy. A chance of Showers and Thunderstorms in the evening. Lows in the lower 70s. Northwest Winds around 5 Mph. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Mount Vernon District Park Temperature Statistics

September Temperature

Washington/Reagan National Airport, DC (5.6 miles)

  • Lowest 1 September, 2026

    77 °F

  • Average September

    86.8 °F

  • Highest 1 September, 2026

    97 °F

Climate (2021–2026)

Washington/Reagan National Airport, DC (5.6 miles)

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  • Average Low 2021–2026

    52.4 °F

  • Average 2021–2026

    60.5 °F

  • Average High 2021–2026

    69.3 °F
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