Lake Mercer Weather Forecast

    • 8
    • 28

    Increasing Clouds

    • 5
    • 23

    Partly Sunny

    • 3
    • 23

    Mostly Sunny

    • 5
    • 18

    Partly Sunny

    • 11
    • 20

    Slight Chance Snow

    • 13
    • 26

    Partly Sunny

Today 27 Jan Fairfax

Sunny. Highs in the upper 20s. Southwest Winds 5 to 10 Mph.

Tonight 27 Jan Fairfax

Mostly clear. Cold with Lows around 1 above. West Winds 5 to 10 Mph with Gusts up to 20 Mph. Wind chill Values as low as 8 below.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Mercer Temperature Statistics

January Temperature

Fort Belvoir (4.3 miles)

  • Lowest 24 January, 2026

    11.3 °F

  • Average January

    36.7 °F

  • Highest 7 January, 2026

    64 °F

Climate (2021–Present)

Fort Belvoir (4.3 miles)

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  • Average Low 2021–2026

    47.7 °F

  • Average 2021–2026

    58 °F

  • Average High 2021–2026

    68.2 °F
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