South Yarmouth Weather Forecast

    • 41
    • 51

    Slight Chance Rain Showers

    • 48
    • 56

    Gradual Clearing

    • 48
    • 63

    Partly Sunny

    • 48
    • 63

    Slight Chance Rain Showers

    • 48
    • 59

    Mostly Cloudy

    • 46
    • 61

    Partly Sunny

    • 46
    • 58

    Mostly Cloudy

Today 12 Apr Barnstable

Mostly sunny. Near steady temperature in the upper 40s. Southeast Winds 5 to 10 Mph.

Tonight 12 Apr Barnstable

Mostly cloudy with a 20 percent chance of Showers. Lows in the lower 40s. South Winds 10 to 15 Mph. Gusts up to 20 Mph, increasing to 30 Mph after midnight.

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South Yarmouth Temperature Statistics

April Temperature

Hyannis, Barnstable Municipal-Boardman Airport (4.3 miles)

  • Lowest 9 April, 2026

    24.1 °F

  • Average April

    43.2 °F

  • Highest 3 April, 2026

    55.9 °F

Climate (2021–Present)

Hyannis, Barnstable Municipal-Boardman Airport (4.3 miles)

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  • Average Low 2021–2026

    44.9 °F

  • Average 2021–2026

    52.4 °F

  • Average High 2021–2026

    59.4 °F
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