Temperature
Cool by day, brisk at night.
Cool days.
Cool by day, brisk at night.
Rain is frequent. About 14 wet days, the lowest monthly average.
Sunshine is limited, with cloud often dominating.
In September, afternoons feel about 57° and nights feel near 50°.
Mostly cloudy skies this month.
Breezy conditions are typical in September. More a comfort consideration than a planning concern.
September late afternoons are around 62°F, easing to about 59°F in early evening.
| Month | High°F | Low°F | Rainin | Wet days | Sunh | Humidity% |
|---|---|---|---|---|---|---|
| Jan | 46 | 39 | 3.6 | 16 | 1.8 | 84 |
| Feb | 47 | 39 | 3.1 | 14 | 3.0 | 83 |
| Mar | 50 | 40 | 2.9 | 14 | 4.0 | 81 |
| Apr | 54 | 42 | 2.8 | 14 | 5.9 | 78 |
| May | 59 | 47 | 2.9 | 15 | 7.2 | 78 |
| Jun | 63 | 52 | 3.1 | 14 | 7.0 | 80 |
| Jul | 66 | 55 | 3.1 | 16 | 6.4 | 81 |
| Aug | 66 | 55 | 3.2 | 16 | 6.0 | 83 |
| Sep | 63 | 52 | 3.4 | 14 | 4.7 | 83 |
| Oct | 57 | 49 | 4.1 | 16 | 3.3 | 84 |
| Nov | 51 | 44 | 4.3 | 17 | 2.2 | 84 |
| Dec | 48 | 40 | 4.3 | 17 | 1.6 | 85 |
Similar climates
Want a side-by-side climate view? Compare Bangor with Aberdeen.
Typical monthly values are based on long-term climate records. Useful for planning, not a forecast. Check the weather before you travel.
Sunshine: source type is not yet identified at metric level.
Local microclimates can vary by beach, neighborhood, trail, or elevation.
Last updated: Jul 31, 2026
Data & methodology