Dennis Port Weather Forecast

    • 33
    • 42

    Mostly Cloudy

    • 23
    • 46

    Partly Sunny

    • 27
    • 34

    Partly Sunny

    • 31
    • 40

    Rain

    • 29
    • 39

    Mostly Cloudy

    • 36
    • 45

    Chance Rain

Today 20 Dec Barnstable

Mostly sunny and cooler. Near steady temperature in the upper 30s. West Winds 5 to 10 Mph with Gusts up to 20 Mph.

Tonight 20 Dec Barnstable

Mostly cloudy and brisk. Lows in the lower 30s. Temperature rising into the lower 40s after midnight. Southwest Winds 10 to 15 Mph, increasing to 15 to 25 Mph after midnight. Gusts up to 35 Mph.

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Dennis Port Temperature Statistics

December Temperature

Chatham, Chatham Municipal Airport (6.8 miles)

  • Lowest 15 December, 2025

    18 °F

  • Average December

    34.1 °F

  • Highest 2 December, 2025

    50 °F

Climate (2020–Present)

Chatham, Chatham Municipal Airport (6.8 miles)

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  • Average Low 2020–2025

    47.6 °F

  • Average 2020–2025

    53.9 °F

  • Average High 2020–2025

    59.9 °F
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