Lake Mercer Weather Forecast

    • 71
    • 89

    Rain Showers Likely

    • 73
    • 95

    Chance Thunderstorms

    • 70
    • 97

    Chance Thunderstorms

    • 67
    • 91

    Mostly Sunny

    • 68
    • 92

    Chance Rain Showers

    • 66
    • 88

    Chance Thunderstorms

Today 10 Jun Fairfax

Mostly cloudy with a chance of Showers with a slight chance of Thunderstorms in the Morning, then partly sunny with Showers likely with a chance of Thunderstorms in the afternoon. Highs in the upper 80s. Southwest Winds 5 to 10 Mph. Chance of rain 60 percent.

Tonight 10 Jun Fairfax

Mostly cloudy with a slight chance of Showers and Thunderstorms. Lows in the upper 60s. South Winds 5 to 10 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Mercer Temperature Statistics

June Temperature

Fort Belvoir (4.3 miles)

  • Lowest 3 June, 2026

    49.5 °F

  • Average June

    72.2 °F

  • Highest 7 June, 2026

    93.4 °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

    68.3 °F
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