South Yarmouth Weather Forecast

    • 71
    • 86

    Increasing Clouds

    • 70
    • 87

    Chance Rain Showers

    • 67
    • 83

    Partly Sunny

    • 67
    • 78

    Mostly Sunny

    • 70
    • 81

    Mostly Sunny

    • 72
    • 84

    Mostly Sunny

Today 9 Jul Barnstable

Sunny. Highs in the lower 80s. Southwest Winds 10 to 15 Mph. Gusts up to 20 Mph, increasing to 30 Mph this afternoon.

Tonight 9 Jul Barnstable

Mostly cloudy. A slight chance of Showers after midnight. Patchy fog after midnight. Humid with Lows around 70. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 20 percent.

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South Yarmouth Temperature Statistics

July Temperature

Hyannis, Barnstable Municipal-Boardman Airport (4.3 miles)

  • Lowest 6 July, 2026

    63 °F

  • Average July

    76.8 °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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