Lake Mercer Weather Forecast

    • 37
    • 46

    Decreasing Clouds

    • 28
    • 46

    Partly Sunny

    • 26
    • 40

    Mostly Cloudy

    • 25
    • 42

    Mostly Sunny

    • 30
    • 47

    Mostly Cloudy

    • 35
    • 41

    Rain

Today 10 Feb Fairfax

Mostly sunny. Highs in the mid 40s. Southeast Winds around 5 Mph.

Tonight 10 Feb Fairfax

Partly cloudy in the Evening, then becoming mostly cloudy. Lows in the mid 30s. Southwest Winds around 5 Mph, becoming northwest after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Mercer Temperature Statistics

February Temperature

Fort Belvoir (4.3 miles)

  • Lowest 6 February, 2026

    14.7 °F

  • Average February

    27.4 °F

  • Highest 4 February, 2026

    41.7 °F

Climate (2021–Present)

Fort Belvoir (4.3 miles)

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  • Average Low 2021–2026

    47.6 °F

  • Average 2021–2026

    57.9 °F

  • Average High 2021–2026

    68.1 °F
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