Lake Mercer Weather Forecast

    • 38
    • 62

    Becoming Sunny

    • 40
    • 57

    Partly Sunny

    • 51
    • 57

    Rain Likely

    • 37
    • 69

    Slight Chance Rain Showers

    • 29
    • 46

    Mostly Sunny

    • 27
    • 43

    Mostly Sunny

    • 31
    • 45

    Partly Sunny

Today 23 Nov Fairfax

Sunny. Highs in the lower 60s. Northwest Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 23 Nov Fairfax

Mostly clear. Lows in the upper 30s. Northwest Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Mercer Temperature Statistics

November Temperature

Fort Belvoir (4.3 miles)

  • Lowest 18 November, 2025

    26.2 °F

  • Average November

    49.9 °F

  • Highest 5 November, 2025

    73.6 °F

Climate (2020–Present)

Fort Belvoir (4.3 miles)

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  • Average Low 2020–2025

    47.8 °F

  • Average 2020–2025

    58.1 °F

  • Average High 2020–2025

    68.3 °F
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