South Run Stream Valley Park Weather Forecast

    • 71
    • 90

    Thunderstorms

    • 68
    • 84

    Rain Showers Likely

    • 66
    • 84

    Mostly Cloudy

    • 65
    • 84

    Mostly Sunny

    • 68
    • 87

    Mostly Sunny

    • 73
    • 94

    Mostly Sunny

Today 10 Jul Fairfax

Mostly sunny. Scattered Showers and Thunderstorms in the afternoon. Highs around 90. West Winds around 5 Mph. Chance of rain 50 percent.

Tonight 10 Jul Fairfax

Mostly cloudy. Scattered Showers and Thunderstorms in the Evening, then isolated Showers after midnight. Lows around 70. West Winds around 5 Mph. Chance of rain 30 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

South Run Stream Valley Park Temperature Statistics

July Temperature

Fort Belvoir (3.1 miles)

  • Lowest 1 July, 2026

    72.3 °F

  • Average July

    84.3 °F

  • Highest 4 July, 2026

    101.3 °F

Climate (2021–2026)

Fort Belvoir (3.1 miles)

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  • Average Low 2021–2026

    47.7 °F

  • Average 2021–2026

    58.1 °F

  • Average High 2021–2026

    68.3 °F
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