South Yarmouth Weather Forecast

    • 50
    • 64

    Rain Showers

    • 50
    • 60

    Rain Showers Likely

    • 56
    • 71

    Mostly Sunny

    • 54
    • 71

    Partly Sunny

    • 54
    • 66

    Partly Sunny

    • 56
    • 69

    Partly Sunny

Today 14 May Barnstable

Showers likely in the Morning, then Showers with a slight chance of Thunderstorms in the afternoon. Highs in the mid 60s. Southeast Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 90 percent.

Tonight 14 May Barnstable

Showers, mainly in the evening. Patchy fog. Lows around 50. East Winds 5 to 10 Mph. Gusts up to 20 Mph in the evening. Chance of rain 90 percent.

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South Yarmouth Temperature Statistics

May Temperature

Hyannis, Barnstable Municipal-Boardman Airport (4.3 miles)

  • Lowest 3 May, 2026

    37.9 °F

  • Average May

    53.2 °F

  • Highest 10 May, 2026

    64 °F

Climate (2021–Present)

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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