South Run Park Weather Forecast

    • 50
    • 69

    Rain Showers Likely

    • 46
    • 64

    Partly Sunny

    • 52
    • 76

    Mostly Cloudy

    • 32
    • 63

    Mostly Sunny

    • 37
    • 51

    Mostly Cloudy

    • 39
    • 56

    Mostly Cloudy

Today 20 Mar Fairfax

Sunny in the Morning, then becoming partly sunny. Highs in the upper 60s. South Winds around 5 Mph, increasing to southwest 10 to 15 Mph with Gusts up to 25 Mph in the afternoon.

Tonight 20 Mar Fairfax

Numerous Showers with isolated Thunderstorms. Lows in the upper 40s. Southwest Winds 5 to 10 Mph. Gusts up to 25 Mph in the evening. Chance of rain 60 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

South Run Park Temperature Statistics

March Temperature

Fort Belvoir (5 miles)

  • Lowest 13 March, 2026

    25.3 °F

  • Average March

    52.1 °F

  • Highest 11 March, 2026

    86.5 °F

Climate (2021–Present)

Fort Belvoir (5 miles)

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  • Average Low 2021–2026

    47.6 °F

  • Average 2021–2026

    58 °F

  • Average High 2021–2026

    68.2 °F
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