Chatham Harbor Entrance Weather Forecast

    • 66
    • 70

    Mostly Sunny

    • 65
    • 70

    Partly Sunny

    • 69
    • 71

    Breezy

    • 65
    • 73

    Chance Rain Showers

    • 64
    • 69

    Mostly Sunny

    • 65
    • 69

    Partly Sunny

Today 7 Sep Barnstable

Sunny. Highs in the mid 70s. Northwest Winds 5 to 10 Mph. Gusts up to 20 Mph this morning.

Tonight 7 Sep Barnstable

Mostly clear. Lows in the lower 60s. West Winds around 5 Mph.

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Chatham Harbor Entrance Temperature Statistics

September Temperature

Chatham, Chatham Municipal Airport (3.1 miles)

  • Lowest 5 September, 2026

    57.9 °F

  • Average September

    66.7 °F

  • Highest 4 September, 2026

    78.1 °F

Climate (2021–2026)

Chatham, Chatham Municipal Airport (3.1 miles)

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  • Average Low 2021–2026

    47.3 °F

  • Average 2021–2026

    53.7 °F

  • Average High 2021–2026

    59.7 °F
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