Lieutenant Island Weather Forecast

    • 37
    • 49

    Chance Rain

    • 27
    • 43

    Breezy

    • 31
    • 36

    Breezy

    • 31
    • 40

    Chance Snow

    • 24
    • 37

    Chance Snow

    • 24
    • 31

    Mostly Cloudy

Today 10 Dec Barnstable

Mostly cloudy and breezy. Highs in the upper 40s. Southwest Winds 15 to 25 Mph with Gusts up to 40 Mph.

Tonight 10 Dec Barnstable

Cloudy with a 40 percent chance of rain. Breezy with Lows in the mid 30s. Southwest Winds 15 to 25 Mph with Gusts up to 40 Mph.

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Lieutenant Island Temperature Statistics

December Temperature

Chatham, Chatham Municipal Airport (14.3 miles)

  • Lowest 5 December, 2025

    19 °F

  • Average December

    35.3 °F

  • Highest 2 December, 2025

    50 °F

Climate (2020–Present)

Chatham, Chatham Municipal Airport (14.3 miles)

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  • Average Low 2020–2025

    47.6 °F

  • Average 2020–2025

    53.9 °F

  • Average High 2020–2025

    60 °F
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