South Run Stream Valley Park Weather Forecast

    • 56
    • 71

    Becoming Sunny

    • 52
    • 76

    Rain Showers

    • 46
    • 65

    Mostly Sunny

    • 48
    • 71

    Partly Sunny

    • 43
    • 62

    Mostly Sunny

    • 47
    • 63

    Partly Sunny

Today 18 Oct Fairfax

Partly sunny. Highs in the lower 70s. South Winds around 5 Mph.

Tonight 18 Oct Fairfax

Clear in the Evening, then becoming partly cloudy. Lows in the mid 50s. Southeast Winds around 5 Mph.

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  • Temperature Real-Time

South Run Stream Valley Park Temperature Statistics

October Temperature

Fort Belvoir (3.1 miles)

  • Lowest 10 October, 2025

    41.2 °F

  • Average October

    61.9 °F

  • Highest 6 October, 2025

    83.1 °F

Climate (2020–Present)

Fort Belvoir (3.1 miles)

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  • Average Low 2020–2025

    47.9 °F

  • Average 2020–2025

    58.1 °F

  • Average High 2020–2025

    68.4 °F
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