Lorton Weather Forecast

    • 53
    • 78

    Rain Showers

    • 50
    • 67

    Partly Sunny

    • 54
    • 74

    Partly Sunny

    • 63
    • 86

    Partly Sunny

    • 67
    • 92

    Slight Chance Thunderstorms

    • 69
    • 94

    Slight Chance Thunderstorms

Today 13 May Fairfax

Mostly sunny. A chance of Showers with a slight chance of Thunderstorms this afternoon. Highs in the mid 70s. Southwest Winds 10 to 15 Mph with Gusts up to 30 Mph. Chance of rain 50 percent.

Tonight 13 May Fairfax

Mostly cloudy with Showers with a chance of Thunderstorms in the Evening, then partly cloudy with a chance of Showers after midnight. Patchy fog after midnight. Lows in the lower 50s. Southwest Winds 5 to 10 Mph with Gusts up to 20 Mph, becoming west after midnight. Chance of rain 90 percent.

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Lorton Temperature Statistics

May Temperature

Fort Belvoir (2.5 miles)

  • Lowest 1 May, 2026

    37.4 °F

  • Average May

    59.8 °F

  • Highest 5 May, 2026

    85.3 °F

Climate (2021–Present)

Fort Belvoir (2.5 miles)

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  • Average Low 2021–2026

    47.7 °F

  • Average 2021–2026

    58 °F

  • Average High 2021–2026

    68.3 °F
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