Dennis Port Weather Forecast

    • 60
    • 74

    Decreasing Clouds

    • 52
    • 75

    Mostly Sunny

    • 50
    • 68

    Mostly Sunny

    • 55
    • 68

    Partly Sunny

    • 59
    • 72

    Partly Sunny

    • 60
    • 75

    Slight Chance Rain Showers

Today 18 Sep Barnstable

Mostly Cloudy, then becoming partly sunny. Patchy drizzle. Patchy fog. Near steady temperature around 70. North Winds around 5 Mph.

Tonight 18 Sep Barnstable

Partly cloudy in the Evening, then becoming mostly clear. Patchy fog. Lows in the lower 60s. West Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Dennis Port Temperature Statistics

September Temperature

Chatham, Chatham Municipal Airport (6.8 miles)

  • Lowest 13 September, 2025

    46.9 °F

  • Average September

    64.5 °F

  • Highest 6 September, 2025

    79 °F

Climate (2020–Present)

Chatham, Chatham Municipal Airport (6.8 miles)

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  • Average Low 2020–2025

    47.7 °F

  • Average 2020–2025

    54 °F

  • Average High 2020–2025

    60.1 °F
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