South Yarmouth Weather Forecast

    • 62
    • 73

    Chance Thunderstorms

    • 67
    • 78

    Partly Sunny

    • 68
    • 81

    Mostly Cloudy

    • 68
    • 81

    Chance Rain Showers

    • 67
    • 80

    Chance Rain Showers

    • 68
    • 80

    Mostly Sunny

Today 30 Jul Barnstable

Mostly cloudy. A chance of Showers with a slight chance of Thunderstorms this Morning, then a chance of Showers and Thunderstorms this afternoon. Patchy fog. Highs in the lower 70s. North Winds 5 to 10 Mph with Gusts up to 20 Mph. Chance of rain 50 percent.

Tonight 30 Jul Barnstable

Mostly cloudy. Patchy fog. A chance of Showers in the evening. Humid with Lows in the lower 60s. North Winds 5 to 10 Mph. Chance of rain 40 percent.

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South Yarmouth Temperature Statistics

July Temperature

Hyannis, Barnstable Municipal-Boardman Airport (4.3 miles)

  • Lowest 20 July, 2026

    53.1 °F

  • Average July

    72.1 °F

  • Highest 4 July, 2026

    93.9 °F

Climate (2021–2026)

Hyannis, Barnstable Municipal-Boardman Airport (4.3 miles)

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  • Average Low 2021–2026

    44.8 °F

  • Average 2021–2026

    52.4 °F

  • Average High 2021–2026

    59.3 °F
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