Chesapeake Bay - James Island Weather Forecast

    • 30
    • 44

    Increasing Clouds

    • 36
    • 38

    Rain/Snow

    • 36
    • 43

    Mostly Cloudy

    • 33
    • 43

    Mostly Cloudy

    • 29
    • 39

    Partly Sunny

    • 36
    • 41

    Mostly Cloudy

Today 4 Dec Dorchester

Partly sunny. Highs in the mid 40s. Northwest Winds 10 to 15 Mph. Gusts up to 25 Mph in the afternoon.

Tonight 4 Dec Dorchester

Partly cloudy in the Evening, then becoming mostly cloudy. Lows in the mid 20s. North Winds 10 to 15 Mph with Gusts up to 25 Mph.

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Chesapeake Bay - James Island Temperature Statistics

December Temperature

Cambridge-Dorchester Airport (16.2 miles)

  • Lowest 1 December, 2025

    28.4 °F

  • Average December

    37.5 °F

  • Highest 1 December, 2025

    44.6 °F

Climate (2020–Present)

Cambridge-Dorchester Airport (16.2 miles)

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  • Average Low 2020–2025

    49.3 °F

  • Average 2020–2025

    58.2 °F

  • Average High 2020–2025

    66.8 °F
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