South Run Park Weather Forecast

    • 46
    • 57

    Rain Likely

    • 42
    • 52

    Rain

    • 29
    • 46

    Slight Chance Rain

    • 29
    • 44

    Mostly Sunny

    • 36
    • 50

    Partly Sunny

    • 33
    • 50

    Chance Rain

Today 9 Jan Fairfax

Partly sunny this Morning, then cloudy with rain likely this afternoon. Highs in the upper 50s. South Winds 5 to 10 Mph with Gusts up to 20 Mph. Chance of rain 70 percent.

Tonight 9 Jan Fairfax

Cloudy with a 50 percent chance of rain. Lows in the mid 40s. Southwest Winds 5 to 10 Mph with Gusts up to 20 Mph, becoming northwest after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

South Run Park Temperature Statistics

January Temperature

Fort Belvoir (5 miles)

  • Lowest 5 January, 2026

    23.2 °F

  • Average January

    33.4 °F

  • Highest 6 January, 2026

    50.4 °F

Climate (2021–Present)

Fort Belvoir (5 miles)

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  • Average Low 2021–2026

    47.7 °F

  • Average 2021–2026

    58 °F

  • Average High 2021–2026

    68.2 °F
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