South Monomoy Island Weather Forecast

    • 65
    • 73

    Mostly Cloudy

    • 67
    • 71

    Mostly Cloudy

    • 66
    • 71

    Mostly Sunny

    • 67
    • 71

    Mostly Sunny

    • 69
    • 73

    Mostly Sunny

    • 71
    • 74

    Partly Sunny

Today 5 Aug Barnstable

Mostly sunny. Near steady temperature in the mid 70s. Northeast Winds 5 to 10 Mph.

Tonight 5 Aug Barnstable

Mostly cloudy. Patchy fog after midnight. Visibility one quarter mile or less at Times after midnight. Lows in the lower 60s. Northeast Winds 5 to 10 Mph.

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South Monomoy Island Temperature Statistics

August Temperature

Chatham, Chatham Municipal Airport (6.8 miles)

  • Lowest 3 August, 2025

    55 °F

  • Average August

    65.5 °F

  • Highest 3 August, 2025

    77 °F

Climate (2020–Present)

Chatham, Chatham Municipal Airport (6.8 miles)

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  • Average Low 2020–2025

    47.8 °F

  • Average 2020–2025

    54.1 °F

  • Average High 2020–2025

    60.2 °F
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