Lahey Lost Valley Park Weather Forecast

    • 54
    • 72

    Becoming Sunny

    • 56
    • 73

    Slight Chance Rain Showers

    • 57
    • 71

    Mostly Cloudy

    • 57
    • 73

    Partly Sunny

    • 56
    • 76

    Mostly Sunny

    • 61
    • 79

    Partly Sunny

Today 25 Sep Central and Southeast Montgomery

Mostly sunny. Highs in the lower 70s. North Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 25 Sep Central and Southeast Montgomery

Partly cloudy in the Evening, then becoming mostly clear. Lows in the mid 50s. North Winds 10 to 15 Mph with Gusts up to 25 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lahey Lost Valley Park Temperature Statistics

September Temperature

Washington/Dulles International Airport, DC (8.7 miles)

  • Lowest 15 September, 2026

    52.6 °F

  • Average September

    74.7 °F

  • Highest 1 September, 2026

    94.6 °F

Climate (2021–2026)

Washington/Dulles International Airport, DC (8.7 miles)

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  • Average Low 2021–2026

    47.6 °F

  • Average 2021–2026

    58.3 °F

  • Average High 2021–2026

    68.6 °F
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