Monhegan Island Harbor Weather Forecast

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    Slight Chance Rain

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    • 60

    Rain

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    Rain

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    Rain

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    Slight Chance Rain Showers

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    Mostly Cloudy

Today 25 Sep Lincoln

Partly sunny. Highs in the lower 70s. Northeast Winds around 10 Mph with Gusts up to 20 Mph.

Tonight 25 Sep Lincoln

Cloudy. A slight chance of rain after midnight. Lows in the lower 50s. Light and variable Winds, becoming northeast around 10 Mph with Gusts up to 20 Mph after midnight. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Monhegan Island Harbor Temperature Statistics

September Temperature

Rockland, Knox County Regional Airport (23.6 miles)

  • Lowest 20 September, 2026

    39 °F

  • Average September

    59.8 °F

  • Highest 10 September, 2026

    84 °F

Climate (2021–2026)

Rockland, Knox County Regional Airport (23.6 miles)

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  • Average Low 2021–2026

    39.4 °F

  • Average 2021–2026

    47.6 °F

  • Average High 2021–2026

    54.8 °F
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