Fountainhead Regional Park Weather Forecast

    • 61
    • 69

    Rain Showers Likely

    • 62
    • 68

    Rain Showers

    • 61
    • 80

    Partly Sunny

    • 62
    • 86

    Mostly Sunny

    • 59
    • 79

    Partly Sunny

    • 59
    • 77

    Partly Sunny

Today 16 Sep Fairfax

Cloudy with a chance of Showers with a slight chance of Thunderstorms. Highs in the upper 60s. Northeast Winds 10 to 15 Mph with Gusts up to 30 Mph. Chance of rain 50 percent.

Tonight 16 Sep Fairfax

A slight chance of Thunderstorms in the evening. Mostly cloudy with a chance of Showers. Lows in the lower 60s. Northeast Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 50 percent.

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Fountainhead Regional Park Temperature Statistics

September Temperature

Fort Belvoir (7.5 miles)

  • Lowest 9 September, 2025

    49.8 °F

  • Average September

    67.8 °F

  • Highest 6 September, 2025

    92.7 °F

Climate (2020–Present)

Fort Belvoir (7.5 miles)

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  • Average Low 2020–2025

    47.8 °F

  • Average 2020–2025

    58.1 °F

  • Average High 2020–2025

    68.3 °F
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