Lake Mercer Weather Forecast

    • 40
    • 65

    Increasing Clouds

    • 44
    • 68

    Sunny

    • 47
    • 67

    Partly Sunny

    • 42
    • 63

    Rain

    • 36
    • 48

    Chance Rain

    • 35
    • 49

    Partly Sunny

    • 35
    • 51

    Mostly Sunny

Today 9 Nov Fairfax

Mostly sunny. Highs in the mid 50s.

Tonight 9 Nov Fairfax

Mostly clear this Evening, then becoming partly cloudy. Lows in the upper 30s. Northwest Winds 5 to 10 Mph, becoming west after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Mercer Temperature Statistics

November Temperature

Fort Belvoir (4.3 miles)

  • Lowest 2 November, 2026

    40.8 °F

  • Average November

    59.3 °F

  • Highest 4 November, 2026

    76.1 °F

Climate (2021–2026)

Fort Belvoir (4.3 miles)

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  • Average Low 2021–2026

    47.8 °F

  • Average 2021–2026

    58.2 °F

  • Average High 2021–2026

    68.4 °F
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