South Yarmouth Weather Forecast

    • 55
    • 67

    Chance Rain Showers

    • 51
    • 69

    Rain Showers Likely

    • 49
    • 63

    Rain Showers Likely

    • 55
    • 69

    Chance Rain Showers

    • 53
    • 69

    Chance Rain Showers

    • 53
    • 67

    Slight Chance Rain Showers

Today 28 May Barnstable

Partly sunny. A chance of Showers in the afternoon. Highs in the mid 60s. North Winds 5 to 10 Mph. Chance of rain 50 percent.

Tonight 28 May Barnstable

Mostly cloudy. Lows in the mid 50s. Northwest Winds around 5 Mph.

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  • Temperature Real-Time

South Yarmouth Temperature Statistics

May Temperature

Hyannis, Barnstable Municipal-Boardman Airport (4.3 miles)

  • Lowest 3 May, 2026

    37.9 °F

  • Average May

    56.2 °F

  • Highest 20 May, 2026

    79 °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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