Colonial Beach Weather Forecast

    • 34
    • 40

    Gradual Clearing

    • 33
    • 44

    Mostly Cloudy

    • 25
    • 35

    Partly Sunny

    • 36
    • 38

    Partly Sunny

    • 40
    • 48

    Slight Chance Rain

    • 36
    • 46

    Chance Rain/Snow

Today 6 Dec Westmoreland

Mostly cloudy. Highs in the lower 40s. West Winds around 5 Mph.

Tonight 6 Dec Westmoreland

Mostly clear in the Evening, then becoming partly cloudy. Lows in the upper 20s. Northwest Winds around 5 Mph.

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Colonial Beach Temperature Statistics

December Temperature

St Marys County Airport (22.4 miles)

  • Lowest 4 December, 2025

    27.7 °F

  • Average December

    36.9 °F

  • Highest 4 December, 2025

    48.2 °F

Climate (2020–Present)

St Marys County Airport (22.4 miles)

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  • Average Low 2020–2025

    49.6 °F

  • Average 2020–2025

    58.1 °F

  • Average High 2020–2025

    66.7 °F
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