Mason Neck State Park Weather Forecast

    • 48
    • 60

    Mostly Cloudy

    • 56
    • 75

    Mostly Cloudy

    • 33
    • 65

    Rain Likely

    • 33
    • 52

    Mostly Sunny

    • 41
    • 59

    Partly Sunny

    • 50
    • 68

    Partly Sunny

Today 25 Mar Fairfax

Partly sunny. Highs around 60. South Winds 5 to 10 Mph.

Tonight 25 Mar Fairfax

Mostly cloudy. Lows in the upper 40s. South Winds 5 to 10 Mph with Gusts up to 20 Mph.

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Mason Neck State Park Temperature Statistics

March Temperature

Fort Belvoir (4.3 miles)

  • Lowest 13 March, 2026

    25.3 °F

  • Average March

    52.2 °F

  • Highest 11 March, 2026

    86.5 °F

Climate (2021–Present)

Fort Belvoir (4.3 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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