Monhegan Island Weather Forecast
- 56
- 65
Partly Sunny
- 61
- 65
Slight Chance Rain Showers
- 63
- 67
Slight Chance Rain Showers
- 59
- 67
Rain Showers Likely
- 56
- 64
Chance Rain Showers
- 56
- 63
Mostly Sunny
Today 3 Sep Lincoln
Partly sunny. Highs in the mid 70s. Light and variable Winds, becoming south around 10 Mph this afternoon.
Tonight 3 Sep Lincoln
Partly cloudy. Patchy fog after midnight. Lows in the lower 50s. Light and variable Winds.
Monhegan Island Temperature Statistics
September Temperature
Rockland, Knox County Regional Airport (23 miles)
Lowest 1 September, 2025
52 °FAverage September
64 °FHighest 1 September, 2025
75.9 °F
Climate (2020–Present)
Rockland, Knox County Regional Airport (23 miles)
Average Low 2020–2025
39.9 °FAverage 2020–2025
48 °FAverage High 2020–2025
55.3 °F