Bar Harbor weather by month & the best time to visit
United States · seaside town · continental climate
The best time to visit Bar Harbor is July — its sunniest month (Sunshine Score 76/100), with August and September close behind. Bar Harbor averages about 2,079 hours of sunshine a year. Daytime highs around 22°C / 72°F and roughly 81 mm of rain in July.
When is the best time to visit Bar Harbor?
For sunshine, the best time to visit Bar Harbor is July, then August and September. The dullest month is January (0/100, 92 mm of rain). The full month-by-month picture is in the table below.
How sunny is Bar Harbor?
Bar Harbor gets a moderate 2,079 hours of sunshine a year. 76 Sunshine Score points separate July (76) from January (0), so the month you pick matters. It ranks #371 of 580 destinations in United States for annual sunshine, below the national median of 2,279 hours. The year's 1,249 mm of rain spreads fairly evenly across the months, with no pronounced dry season.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV | Sea |
|---|---|---|---|---|---|---|
| January | 0 | -1° / 30°F | -8° / 18°F | 92 mm | 1 | 5° / 41°F |
| February | 0 | 0° / 32°F | -8° / 18°F | 86 mm | 2 | 4° / 39°F |
| March | 0 | 3° / 37°F | -4° / 25°F | 95 mm | 3 | 4° / 39°F |
| April | 6 | 9° / 48°F | 1° / 34°F | 103 mm | 4 | 7° / 45°F |
| May | 37 | 14° / 57°F | 6° / 43°F | 96 mm | 5 | 12° / 54°F |
| June | 59 | 18° / 64°F | 11° / 52°F | 112 mm | 6 | 17° / 63°F |
| July | 76 | 22° / 72°F | 14° / 57°F | 81 mm | 6 | 20° / 68°F |
| August | 75 | 22° / 72°F | 15° / 59°F | 85 mm | 6 | 21° / 70°F |
| September | 66 | 19° / 66°F | 12° / 54°F | 100 mm | 5 | 18° / 64°F |
| October | 27 | 13° / 55°F | 7° / 45°F | 139 mm | 3 | 13° / 55°F |
| November | 0 | 8° / 46°F | 2° / 36°F | 125 mm | 1 | 9° / 48°F |
| December | 0 | 2° / 36°F | -4° / 25°F | 135 mm | 1 | 6° / 43°F |
Sea temperature in Bar Harbor by month
The sea off Bar Harbor is warmest in August at around 21°C / 70°F, and coolest in February at 4°C / 39°F. The water sits at a comfortable 21°C or warmer roughly 1 month a year. Month-by-month sea-surface temperatures are in the Sea column of the table above.
Nearest destinations
Bar Harbor: questions and answers
What kind of destination is Bar Harbor?
Bar Harbor is a seaside town in United States with a continental climate — the sea reaches 21°C at its warmest and is swimmable (21°C+) about 1 months a year.
How many hours of sunshine does Bar Harbor get a year?
Bar Harbor gets about 2,079 hours of sunshine a year, at its best around July.
When is the best time to visit Bar Harbor?
The sunniest time to visit Bar Harbor is July, when the Sunshine Score peaks at 76/100 (with August and September close behind). Expect daytime highs around 22°C / 72°F.
What is the least sunny month in Bar Harbor?
January is the least sunny month in Bar Harbor, scoring 0/100 with about 92 mm of rain.
What is the sea temperature in Bar Harbor?
The sea in Bar Harbor ranges from about 4°C (February) to 21°C (August). Month-by-month sea temperatures are on this page.
How strong is the sun in Bar Harbor?
The typical midday UV index in Bar Harbor peaks around 6 (high) in June, easing to about 1 (low) in January. Month-by-month midday UV values are in the UV column of the table on this page.
Put the Bar Harbor sunshine badge on your site
A compact badge showing Bar Harbor's sunshine at a glance — free to embed under CC BY 4.0. Paste this wherever you'd like it to appear:
Live preview — this is exactly what your readers see: