South Yarmouth Weather Forecast

    • 48
    • 64

    Rain Showers

    • 50
    • 63

    Mostly Sunny

    • 51
    • 64

    Rain Showers Likely

    • 52
    • 68

    Rain Showers Likely

    • 49
    • 67

    Rain Showers Likely

    • 49
    • 64

    Partly Sunny

Today 7 May Barnstable

Partly sunny. Showers likely in the morning. Patchy fog in the morning. Highs in the mid 60s. West Winds 5 to 10 Mph. Chance of rain 70 percent.

Tonight 7 May Barnstable

Mostly clear. Lows in the upper 40s. West Winds 5 to 10 Mph.

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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

    51 °F

  • Highest 4 May, 2026

    63 °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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