Loch Lomond Weather Forecast

    • 70
    • 88

    Chance Thunderstorms

    • 63
    • 79

    Chance Rain Showers

    • 61
    • 83

    Mostly Sunny

    • 66
    • 84

    Partly Sunny

    • 64
    • 86

    Chance Rain Showers

    • 59
    • 83

    Slight Chance Thunderstorms

Today 20 Aug Northwest Prince William

Mostly cloudy in the Morning, then mostly sunny with a slight chance of Showers and Thunderstorms in the afternoon. Highs in the mid 80s. Southeast Winds around 5 Mph. Chance of rain 20 percent.

Tonight 20 Aug Northwest Prince William

Cloudy with patchy drizzle. Patchy fog. Lows in the upper 60s. East Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Loch Lomond Temperature Statistics

August Temperature

Manassas, Manassas Regional Airport/Harry P. Davis Field (5 miles)

  • Lowest 10 August, 2025

    55 °F

  • Average August

    74.2 °F

  • Highest 17 August, 2025

    95 °F

Climate (2020–Present)

Manassas, Manassas Regional Airport/Harry P. Davis Field (5 miles)

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  • Average Low 2020–2025

    46.2 °F

  • Average 2020–2025

    57.1 °F

  • Average High 2020–2025

    68 °F
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