Lake Mercer Weather Forecast

    • 66
    • 91

    Sunny

    • 57
    • 83

    Mostly Sunny

    • 64
    • 86

    Partly Sunny

    • 72
    • 90

    Chance Thunderstorms

    • 73
    • 97

    Chance Thunderstorms

    • 71
    • 96

    Chance Thunderstorms

    • 69
    • 93

    Chance Thunderstorms

Today 7 Jun Fairfax

Mostly sunny with isolated Showers. Highs around 90. Northwest Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 20 percent.

Tonight 7 Jun Fairfax

Mostly clear. Lows in the mid 60s. North Winds 5 to 10 Mph.

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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

    69.4 °F

  • Highest 5 June, 2026

    91.6 °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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