Lake Mercer Weather Forecast

    • 43
    • 54

    Mostly Sunny

    • 40
    • 57

    Partly Sunny

    • 53
    • 59

    Rain

    • 32
    • 71

    Rain Showers

    • 26
    • 43

    Partly Sunny

    • 32
    • 44

    Mostly Cloudy

Today 13 Mar Fairfax

Mostly sunny and breezy. Highs in the mid 50s. South Winds 20 to 25 Mph with Gusts up to 45 Mph.

Tonight 13 Mar Fairfax

Mostly clear. Lows in the lower 40s. Southwest Winds 15 to 20 Mph. Gusts up to 45 Mph, decreasing to 30 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Mercer Temperature Statistics

March Temperature

Fort Belvoir (4.3 miles)

  • Lowest 2 March, 2026

    31.1 °F

  • Average March

    52.8 °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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