Codman Island Weather Forecast
- 52
- 74
Sunny
- 53
- 75
Mostly Sunny
- 55
- 73
Mostly Cloudy
- 57
- 75
Partly Sunny
- 45
- 74
Mostly Sunny
- 46
- 66
Mostly Sunny
- 51
- 68
Partly Sunny
Today 15 Sep Knox
Sunny. Highs in the mid 70s. Light and variable Winds.
Tonight 15 Sep Knox
Clear. Patchy fog after midnight. Lows in the lower 50s. Light and variable Winds.
Codman Island Temperature Statistics
September Temperature
Rockland, Knox County Regional Airport (11.2 miles)
Lowest 10 September, 2025
43 °FAverage September
59.9 °FHighest 1 September, 2025
75.9 °F
Climate (2020–Present)
Rockland, Knox County Regional Airport (11.2 miles)
Average Low 2020–2025
39.9 °FAverage 2020–2025
48 °FAverage High 2020–2025
55.3 °F