Mashnee Island Weather Forecast

    • 61
    • 69

    Mostly Cloudy

    • 64
    • 69

    Chance Rain Showers

    • 64
    • 70

    Chance Rain Showers

    • 58
    • 74

    Mostly Sunny

    • 55
    • 64

    Mostly Sunny

    • 58
    • 65

    Partly Sunny

    • 62
    • 69

    Partly Sunny

Today 16 Sep Barnstable

Partly sunny. Near steady temperature in the upper 60s. East Winds 5 to 10 Mph with Gusts up to 20 Mph.

Tonight 16 Sep Barnstable

Partly cloudy this Evening, then becoming mostly cloudy. Lows in the upper 50s. East Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Mashnee Island Temperature Statistics

September Temperature

Otis Air National Guard Base (7.5 miles)

  • Lowest 13 September, 2025

    44.6 °F

  • Average September

    64 °F

  • Highest 6 September, 2025

    82.4 °F

Climate (2020–Present)

Otis Air National Guard Base (7.5 miles)

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  • Average Low 2020–2025

    44 °F

  • Average 2020–2025

    52.2 °F

  • Average High 2020–2025

    59.4 °F
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