Dennis Weather Forecast

    • 42
    • 54

    Mostly Sunny

    • 48
    • 57

    Chance Rain Showers

    • 47
    • 57

    Mostly Cloudy

    • 49
    • 57

    Chance Rain Showers

    • 49
    • 57

    Chance Rain Showers

    • 48
    • 56

    Breezy

Today 18 Oct Barnstable

Sunny. Near steady temperature in the lower 50s. Northeast Winds 5 to 10 Mph.

Tonight 18 Oct Barnstable

Clear. Lows in the lower 40s. East Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Dennis Temperature Statistics

October Temperature

Hyannis, Barnstable Municipal-Boardman Airport (5.6 miles)

  • Lowest 7 October, 2026

    36 °F

  • Average October

    59.4 °F

  • Highest 2 October, 2026

    77 °F

Climate (2021–2026)

Hyannis, Barnstable Municipal-Boardman Airport (5.6 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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