South Run Park Weather Forecast

    • 63
    • 66

    Slight Chance Rain Showers

    • 62
    • 82

    Becoming Sunny

    • 63
    • 87

    Mostly Sunny

    • 62
    • 79

    Partly Sunny

    • 62
    • 78

    Mostly Cloudy

    • 62
    • 80

    Partly Sunny

    • 63
    • 82

    Partly Sunny

Today 17 Sep Fairfax

Cloudy with a 50 percent chance of Showers. Highs in the upper 60s. North Winds around 10 Mph with Gusts up to 20 Mph.

Tonight 17 Sep Fairfax

Mostly cloudy. Lows in the lower 60s. North Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

South Run Park Temperature Statistics

September Temperature

Fort Belvoir (5 miles)

  • Lowest 9 September, 2025

    49.8 °F

  • Average September

    67.9 °F

  • Highest 6 September, 2025

    92.7 °F

Climate (2020–Present)

Fort Belvoir (5 miles)

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  • Average Low 2020–2025

    47.8 °F

  • Average 2020–2025

    58.1 °F

  • Average High 2020–2025

    68.3 °F
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