South Run Stream Valley Park Weather Forecast

    • 55
    • 74

    Partly Sunny

    • 47
    • 69

    Mostly Sunny

    • 59
    • 73

    Partly Sunny

    • 63
    • 84

    Mostly Cloudy

    • 65
    • 88

    Partly Sunny

    • 68
    • 92

    Mostly Cloudy

    • 65
    • 89

    Mostly Cloudy

Today 10 Apr Fairfax

Sunny. Highs in the mid 70s. South Winds around 10 Mph.

Tonight 10 Apr Fairfax

Partly cloudy. Lows in the mid 50s. South Winds 5 to 10 Mph, becoming west after midnight.

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South Run Stream Valley Park Temperature Statistics

April Temperature

Fort Belvoir (3.1 miles)

  • Lowest 8 April, 2026

    36.9 °F

  • Average April

    60.5 °F

  • Highest 1 April, 2026

    88.5 °F

Climate (2021–Present)

Fort Belvoir (3.1 miles)

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  • Average Low 2021–2026

    47.6 °F

  • Average 2021–2026

    58 °F

  • Average High 2021–2026

    68.3 °F
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