Mason Neck Weather Forecast

    • 50
    • 70

    Chance Rain Showers

    • 53
    • 75

    Increasing Clouds

    • 57
    • 78

    Mostly Sunny

    • 64
    • 86

    Sunny

    • 69
    • 90

    Mostly Sunny

    • 73
    • 93

    Partly Sunny

    • 71
    • 91

    Chance Thunderstorms

Today 31 May Fairfax

Numerous Showers and scattered Thunderstorms. Highs around 70. Northwest Winds 15 to 20 Mph with Gusts up to 30 Mph. Chance of rain 70 percent.

Tonight 31 May Fairfax

Mostly clear. Isolated Showers and Thunderstorms this evening. Lows in the upper 40s. Northwest Winds 15 to 20 Mph with Gusts up to 35 Mph, becoming west 5 to 10 Mph after midnight. Chance of rain 20 percent.

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Mason Neck Temperature Statistics

May Temperature

Fort Belvoir (3.7 miles)

  • Lowest 10 May, 2025

    41.9 °F
  • Average May

    66 °F
  • Highest 16 May, 2025

    89.2 °F

Climate (2020–Present)

Fort Belvoir (3.7 miles)

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  • Average Low 2020–2025

    47.9 °F
  • Average 2020–2025

    58.1 °F
  • Average High 2020–2025

    68.4 °F
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