Sandy Run Regional Park Weather Forecast

    • 65
    • 84

    Chance Thunderstorms

    • 60
    • 75

    Rain Showers

    • 55
    • 66

    Rain Showers

    • 55
    • 64

    Chance Rain Showers

    • 52
    • 65

    Chance Rain Showers

    • 52
    • 66

    Slight Chance Rain Showers

Today 20 Sep Fairfax

Mostly cloudy. Scattered Showers in the Morning, then scattered Showers with a chance of Thunderstorms in the afternoon. Highs in the lower 80s. Southwest Winds 5 to 10 Mph with Gusts up to 20 Mph. Chance of rain 50 percent.

Tonight 20 Sep Fairfax

Mostly cloudy. Numerous Showers with a chance of Thunderstorms in the Evening, then a slight chance of Showers and Thunderstorms after midnight. Lows in the mid 60s. Southwest Winds around 5 Mph, becoming north after midnight. Chance of rain 70 percent.

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  • Temperature Real-Time

Sandy Run Regional Park Temperature Statistics

September Temperature

Fort Belvoir (6.2 miles)

  • Lowest 15 September, 2026

    53.8 °F

  • Average September

    75.4 °F

  • Highest 1 September, 2026

    96.4 °F

Climate (2021–2026)

Fort Belvoir (6.2 miles)

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  • Average Low 2021–2026

    47.8 °F

  • Average 2021–2026

    58.2 °F

  • Average High 2021–2026

    68.4 °F
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