Osterville Weather Forecast

    • 62
    • 70

    Chance Rain Showers

    • 62
    • 71

    Chance Rain Showers

    • 57
    • 74

    Mostly Sunny

    • 54
    • 64

    Mostly Sunny

    • 57
    • 65

    Partly Sunny

    • 61
    • 70

    Partly Sunny

Today 17 Sep Barnstable

Partly sunny. A slight chance of Showers this afternoon. Highs in the lower 70s. East Winds 5 to 10 Mph. Gusts up to 20 Mph this afternoon. Chance of rain 20 percent.

Tonight 17 Sep Barnstable

Mostly cloudy. A chance of Showers in the Evening, then a chance of Showers with isolated Thunderstorms after midnight. Lows in the lower 60s. East Winds 5 to 10 Mph. Chance of rain 50 percent.

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Osterville Temperature Statistics

September Temperature

Hyannis, Barnstable Municipal-Boardman Airport (6.2 miles)

  • Lowest 13 September, 2025

    44.1 °F

  • Average September

    64.1 °F

  • Highest 6 September, 2025

    77 °F

Climate (2020–Present)

Hyannis, Barnstable Municipal-Boardman Airport (6.2 miles)

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  • Average Low 2020–2025

    45.3 °F

  • Average 2020–2025

    52.9 °F

  • Average High 2020–2025

    59.9 °F
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