South Monomoy Island Weather Forecast

    • 49
    • 52

    Slight Chance Thunderstorms

    • 46
    • 54

    Chance Rain Showers

    • 46
    • 49

    Mostly Cloudy

    • 41
    • 52

    Chance Rain Showers

    • 38
    • 45

    Slight Chance Rain/Snow

    • 43
    • 47

    Partly Sunny

Today 16 Apr Barnstable

Partly sunny. A slight chance of Showers and Thunderstorms in the morning. Patchy fog in the morning. Cooler with Highs around 60. Southwest Winds 5 to 10 Mph. Chance of rain 20 percent.

Tonight 16 Apr Barnstable

Mostly cloudy with a chance of Showers with a slight chance of Thunderstorms. Patchy fog. Near steady temperature in the lower 50s. Southwest Winds around 5 Mph. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

South Monomoy Island Temperature Statistics

April Temperature

Chatham, Chatham Municipal Airport (6.8 miles)

  • Lowest 9 April, 2026

    27 °F

  • Average April

    43.5 °F

  • Highest 11 April, 2026

    55.9 °F

Climate (2021–Present)

Chatham, Chatham Municipal Airport (6.8 miles)

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  • Average Low 2021–2026

    47.4 °F

  • Average 2021–2026

    53.7 °F

  • Average High 2021–2026

    59.8 °F
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