Bar Harbor, Maine: vitamin D, best months and travel guide
Gateway to Acadia National Park and a charming harbour. Best for: hikers, couples, families.
The best months for vitamin D in Bar Harbor are June to August, when a full dose takes about 8 minutes at midday. Too cool from September to May.
Bar Harbor month by month
| Month | Rating | Sun window | Peak UV | Full dose, age 30 | Afternoon high | Rainy days |
|---|---|---|---|---|---|---|
| January | Too cold | 0.2 h | 1.9 | – | 0°C | 8/30 |
| February | Too cold | 2.7 h | 2.9 | 18 min | 2°C | 3/30 |
| March | Too cold | 3.5 h | 3.3 | 16 min | 6°C | 14/30 |
| April | Too cold | 5.7 h | 5.1 | 10 min | 10°C | 7/30 |
| May | Too cold | 6.8 h | 6.1 | 9 min | 17°C | 4/30 |
| June | Good | 7.3 h | 6.4 | 8 min | 22°C | 7/30 |
| July | Good | 7.6 h | 6.4 | 8 min | 26°C | 8/30 |
| August | Good | 6.8 h | 5.9 | 9 min | 24°C | 8/30 |
| September | Too cold | 6.0 h | 5.0 | 11 min | 22°C | 2/30 |
| October | Too cold | 3.7 h | 3.5 | 15 min | 15°C | 5/30 |
| November | Too cold | 0.9 h | 2.1 | – | 9°C | 6/30 |
| December | Too cold | 0.0 h | 1.8 | – | 2°C | 11/30 |
Sun window is the number of hours a day with UV Index 2.5 or higher. Full dose is the minutes at midday for about 1,000 IU of vitamin D with a quarter of the body bare, for skin type III. Rainy days are days with at least 1 mm out of 30.
What to expect in Bar Harbor
Gateway to Acadia National Park and a charming harbour. A short, cool summer from July to early September, a cold sea for swimming, and foggy mornings. Autumn colours are a major draw.
In Bar Harbor afternoon highs average from 0°C in January to 26°C in July. The wettest month is March (about 14 rainy days out of 30) and the driest is September (2). Midday UV peaks at 6.4 in June.
Adjacent to Acadia National Park (Wikivoyage, CC BY-SA 4.0)
Questions about Bar Harbor
When is the best time to visit Bar Harbor for vitamin D?
The best months for vitamin D in Bar Harbor are June to August, when a full dose takes about 8 minutes at midday.
What is the weather like in Bar Harbor?
Afternoon highs average from 0°C in January to 26°C in July. The wettest month is March, with about 14 rainy days out of 30.
Which months should I avoid in Bar Harbor?
For a beach stay, avoid the months when it is too cool from September to May.