South Run Stream Valley Park Weather Forecast

    • 75
    • 91

    Chance Rain Showers

    • 71
    • 91

    Rain Showers

    • 70
    • 85

    Partly Sunny

    • 69
    • 89

    Mostly Sunny

    • 68
    • 87

    Mostly Sunny

    • 72
    • 89

    Partly Sunny

    • 74
    • 92

    Partly Sunny

Today 30 Jun Fairfax

Numerous Showers and Thunderstorms. Some Thunderstorms may produce heavy rainfall. Highs in the lower 90s. South Winds around 10 Mph. Chance of rain 70 percent.

Tonight 30 Jun Fairfax

Mostly cloudy with numerous Thunderstorms and scattered Showers this Evening, then partly cloudy with a slight chance of Showers and Thunderstorms after midnight. Some Thunderstorms may produce heavy rainfall this evening. Lows in the mid 70s. South Winds 5 to 10 Mph. Chance of rain 70 percent.

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South Run Stream Valley Park Temperature Statistics

June Temperature

Fort Belvoir (3.1 miles)

  • Lowest 1 June, 2025

    42.4 °F

  • Average June

    75.5 °F

  • Highest 24 June, 2025

    99.7 °F

Climate (2020–Present)

Fort Belvoir (3.1 miles)

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  • Average Low 2020–2025

    48 °F

  • Average 2020–2025

    58.1 °F

  • Average High 2020–2025

    68.4 °F
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