South Dennis Weather Forecast

    • 55
    • 64

    Mostly Cloudy

    • 56
    • 64

    Mostly Cloudy

    • 61
    • 70

    Partly Sunny

    • 57
    • 72

    Slight Chance Rain Showers

    • 54
    • 63

    Chance Rain Showers

    • 53
    • 61

    Chance Rain Showers

    • 48
    • 61

    Partly Sunny

Today 29 Sep Barnstable

Sunny. Highs in the upper 50s.

Tonight 29 Sep Barnstable

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

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  • Temperature Forecast NOAA

  • Temperature Real-Time

South Dennis Temperature Statistics

September Temperature

Hyannis, Barnstable Municipal-Boardman Airport (6.2 miles)

  • Lowest 16 September, 2026

    46.9 °F

  • Average September

    64.5 °F

  • Highest 10 September, 2026

    82 °F

Climate (2021–2026)

Hyannis, Barnstable Municipal-Boardman Airport (6.2 miles)

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  • Average Low 2021–2026

    44.7 °F

  • Average 2021–2026

    52.3 °F

  • Average High 2021–2026

    59.2 °F
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