Monhegan Island Harbor Weather Forecast

    • 57
    • 61

    Increasing Clouds

    • 58
    • 61

    Rain Showers Likely

    • 52
    • 66

    Mostly Sunny

    • 54
    • 58

    Mostly Cloudy

    • 54
    • 60

    Chance Rain Showers

    • 54
    • 59

    Chance Rain Showers

Today 16 Sep Lincoln

Patchy fog in the morning. Partly sunny. Highs in the mid 70s. South Winds around 10 Mph.

Tonight 16 Sep Lincoln

Partly cloudy. Lows in the mid 50s. Light and variable Winds.

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  • Temperature Real-Time

Monhegan Island Harbor Temperature Statistics

September Temperature

Rockland, Knox County Regional Airport (23.6 miles)

  • Lowest 12 September, 2026

    44.1 °F

  • Average September

    62 °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

    39.5 °F

  • Average 2021–2026

    47.6 °F

  • Average High 2021–2026

    54.8 °F
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