Colonial Beach Weather Forecast

    • 77
    • 84

    Thunderstorms

    • 78
    • 83

    Chance Thunderstorms

    • 74
    • 86

    Chance Thunderstorms

    • 70
    • 79

    Mostly Sunny

    • 72
    • 79

    Partly Sunny

    • 75
    • 80

    Slight Chance Thunderstorms

Today 18 Jul Westmoreland

Partly sunny. A chance of Showers and Thunderstorms this afternoon. Highs in the upper 80s. Northeast Winds around 5 Mph. Chance of rain 50 percent.

Tonight 18 Jul Westmoreland

Mostly cloudy with a chance of Showers and Thunderstorms. Patchy fog after midnight. Humid with Lows in the lower 70s. South Winds around 5 Mph. Chance of rain 50 percent.

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Colonial Beach Temperature Statistics

July Temperature

St Marys County Airport (22.4 miles)

  • Lowest 5 July, 2025

    62.6 °F

  • Average July

    77.7 °F

  • Highest 1 July, 2025

    91.4 °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

    66.8 °F
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