Fountainhead Regional Park Weather Forecast

    • 66
    • 89

    Rain Showers

    • 68
    • 82

    Rain Showers

    • 67
    • 83

    Rain Showers Likely

    • 64
    • 84

    Slight Chance Thunderstorms

    • 62
    • 82

    Mostly Sunny

    • 65
    • 83

    Partly Sunny

    • 69
    • 86

    Chance Thunderstorms

Today 20 Aug Fairfax

Showers likely with a chance of Thunderstorms. Some Thunderstorms may be severe with damaging Winds, large Hail, and Tornadoes. Highs in the upper 80s. West Winds 5 to 10 Mph. Chance of rain 70 percent.

Tonight 20 Aug Fairfax

Mostly cloudy. A chance of Showers and Thunderstorms in the evening. Some Thunderstorms may be severe with damaging Winds, large Hail, and Tornadoes. Lows in the mid 60s. North Winds 5 to 10 Mph. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

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Fountainhead Regional Park Temperature Statistics

August Temperature

Fort Belvoir (7.5 miles)

  • Lowest 1 August, 2026

    65.5 °F

  • Average August

    79.8 °F

  • Highest 8 August, 2026

    92.8 °F

Climate (2021–2026)

Fort Belvoir (7.5 miles)

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  • Average Low 2021–2026

    47.8 °F

  • Average 2021–2026

    58.1 °F

  • Average High 2021–2026

    68.3 °F
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