South Run Stream Valley Park Weather Forecast

    • 32
    • 65

    Chance Rain Showers

    • 31
    • 49

    Mostly Sunny

    • 47
    • 60

    Partly Sunny

    • 57
    • 70

    Mostly Cloudy

    • 64
    • 81

    Partly Sunny

    • 51
    • 84

    Chance Rain

    • 50
    • 62

    Rain Likely

Today 27 Mar Fairfax

Showers likely. Highs in the lower 60s. North Winds around 10 Mph with Gusts up to 20 Mph. Chance of rain 70 percent.

Tonight 27 Mar Fairfax

Mostly cloudy with a chance of rain Showers in the Evening, then partly cloudy with a chance of Flurries after midnight. Much cooler with Lows in the lower 30s. North Winds 5 to 10 Mph. Gusts up to 25 Mph after midnight. Chance of precipitation 50 percent.

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South Run Stream Valley Park Temperature Statistics

March Temperature

Fort Belvoir (3.1 miles)

  • Lowest 13 March, 2026

    25.3 °F

  • Average March

    52 °F

  • Highest 11 March, 2026

    86.5 °F

Climate (2021–Present)

Fort Belvoir (3.1 miles)

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  • Average Low 2021–2026

    47.6 °F

  • Average 2021–2026

    57.9 °F

  • Average High 2021–2026

    68.2 °F
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