Monhegan Island Harbor Weather Forecast

    • 58
    • 62

    Rain Showers

    • 53
    • 64

    Chance Rain Showers

    • 55
    • 59

    Mostly Sunny

    • 57
    • 61

    Partly Sunny

    • 58
    • 62

    Chance Rain Showers

    • 55
    • 63

    Slight Chance Rain Showers

Today 13 Sep Lincoln

Patchy fog in the morning. A chance of Showers in the Morning, then Showers in the afternoon. Highs in the upper 60s. South Winds around 10 Mph with Gusts up to 20 Mph. Chance of rain 90 percent.

Tonight 13 Sep Lincoln

Mostly cloudy. A chance of Showers after midnight. Lows in the upper 50s. Light and variable Winds. Chance of rain 40 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 1 September, 2026

    48.9 °F

  • Average September

    62.5 °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

    54.9 °F
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