Dennis Port Weather Forecast

    • 9
    • 34

    Increasing Clouds

    • 12
    • 18

    Chance Snow

    • 24
    • 31

    Snow

    • 14
    • 34

    Snow

    • 14
    • 25

    Partly Sunny

    • 14
    • 26

    Mostly Cloudy

Today 23 Jan Barnstable

Mostly sunny. Highs in the mid 30s. West Winds 15 to 20 Mph with Gusts up to 30 Mph.

Tonight 23 Jan Barnstable

Partly cloudy. Heavy freezing spray after midnight. Brisk and much cooler with Lows around 9 above. Northwest Winds 20 to 25 Mph with Gusts up to 35 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Dennis Port Temperature Statistics

January Temperature

Chatham, Chatham Municipal Airport (6.8 miles)

  • Lowest 20 January, 2026

    18 °F

  • Average January

    35.7 °F

  • Highest 11 January, 2026

    48.9 °F

Climate (2021–Present)

Chatham, Chatham Municipal Airport (6.8 miles)

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  • Average Low 2021–2026

    47.6 °F

  • Average 2021–2026

    53.9 °F

  • Average High 2021–2026

    60 °F
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