Lahey Lost Valley Park Weather Forecast

    • 61
    • 82

    Mostly Cloudy

    • 60
    • 71

    Rain Showers Likely

    • 61
    • 70

    Rain Showers Likely

    • 61
    • 80

    Mostly Sunny

    • 61
    • 86

    Mostly Sunny

    • 60
    • 80

    Mostly Cloudy

Today 15 Sep Central and Southeast Montgomery

Partly sunny. Highs in the lower 80s. Northeast Winds 5 to 10 Mph.

Tonight 15 Sep Central and Southeast Montgomery

Partly cloudy. Lows in the lower 60s. Light and variable Winds.

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Lahey Lost Valley Park Temperature Statistics

September Temperature

Washington/Dulles International Airport, DC (8.7 miles)

  • Lowest 8 September, 2025

    48 °F

  • Average September

    68.7 °F

  • Highest 6 September, 2025

    93 °F

Climate (2020–Present)

Washington/Dulles International Airport, DC (8.7 miles)

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  • Average Low 2020–2025

    47.7 °F

  • Average 2020–2025

    58.2 °F

  • Average High 2020–2025

    68.5 °F
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