South Monomoy Island Weather Forecast

    • 42
    • 56

    Sunny

    • 46
    • 59

    Sunny

    • 49
    • 58

    Sunny

    • 49
    • 51

    Mostly Sunny

    • 51
    • 52

    Partly Sunny

    • 57
    • 58

    Mostly Sunny

    • 55
    • 58

    Partly Sunny

Today 24 Oct Barnstable

Sunny. Near steady temperature in the mid 50s. Northwest Winds 5 to 10 Mph.

Tonight 24 Oct Barnstable

Clear. Areas of frost after midnight. Cold with Lows around 30. Southwest Winds around 5 Mph in the Evening, becoming light and variable.

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South Monomoy Island Temperature Statistics

October Temperature

Chatham, Chatham Municipal Airport (6.8 miles)

  • Lowest 19 October, 2026

    37.9 °F

  • Average October

    56.6 °F

  • Highest 14 October, 2026

    72 °F

Climate (2021–2026)

Chatham, Chatham Municipal Airport (6.8 miles)

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  • Average Low 2021–2026

    47.2 °F

  • Average 2021–2026

    53.5 °F

  • Average High 2021–2026

    59.6 °F
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