Winter
Dec → Feb0 to 3°
nights -9 to -5°
- 10 rainy days · 119 mm
When is the best time to visit Acadia and Bar Harbor?
- Jan0°not recommended
- Feb2°not recommended
- Mar5°not recommended
- Apr12°not recommended
- May18°fair
- Jun23°recommended
- Jul26°recommended
- Aug26°recommended
- Sep22°recommended
- Oct15°recommended
- Nov9°fair
- Dec3°not recommended
RecommendedFairNot recommended· afternoon temperature
The weather in Acadia and Bar Harbor, month by month
The table of averages, month by month
| Month | High | Low | Rainfall | Rainy days | Best |
|---|---|---|---|---|---|
| January | 0° | -9° | 114 mm | 10 d | |
| February | 2° | -8° | 98 mm | 8 d | |
| March | 5° | -4° | 126 mm | 10 d | |
| April | 12° | 2° | 131 mm | 9 d | |
| May | 18° | 7° | 114 mm | 10 d | |
| June | 23° | 12° | 109 mm | 9 d | ✓ |
| July | 26° | 16° | 83 mm | 8 d | ✓ |
| August | 26° | 15° | 88 mm | 7 d | ✓ |
| September | 22° | 12° | 107 mm | 8 d | ✓ |
| October | 15° | 6° | 149 mm | 9 d | ✓ |
| November | 9° | 0° | 150 mm | 9 d | |
| December | 3° | -5° | 144 mm | 11 d |
The four seasons in Acadia and Bar Harbor, in figures
What the 2015-2024 averages (Acadia National Park) show, season by season, to compare at a glance instead of reading twelve rows of a table.
Spring
Mar → May5 to 18°
nights -4 to 7°
- 10 rainy days · 124 mm
Summer
Jun → Aug23 to 26°
nights 12 to 16°
- 8 rainy days · 93 mm
Autumn
Sep → Nov9 to 22°
nights 0 to 12°
- 9 rainy days · 135 mm
Book early for June to October
The timing is right, so it is right for everyone: in these months the best places to stay and the small-group tours go first. Here is where to start.
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Daylight in Acadia and Bar Harbor, month by month
The time between sunrise and sunset, from shortest to longest. Not to be confused with the sunshine hours in the table above, which count clear skies. In June there are 15h31 of daylight, in December 8h52, a difference of 6h39.
9h12Jan
10h23Feb
11h47Mar
13h24Apr
14h46May
15h31Jun
15h12Jul
14h01Aug
12h27Sep
10h53Oct
9h32Nov
8h52Dec
Calculated for the latitude of the reference point "Acadia National Park" (44.37°). Values on the 15th of each month, local solar time.
What to do in Acadia and Bar Harbor, month by month
| Activity | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Hiking | ||||||||||||
| Towns & culture | ||||||||||||
| Long days |
favourablewith compromisesunfavourable
- Hiking: April, June, July, August, September, October
- Towns & culture: April, May, June, July, August, September, October, November
- Long days: May, June, July, August
Grid derived from the climate averages (temperature, rainfall), not from an opinion.
Travelling off-peak
Month by month, in detail
January
Not recommended0°-9° at night
- 114 mm · 10 d
Low season, lower prices
February
Not recommended2°-8° at night
- 98 mm · 8 d
Low season, lower prices
March
Not recommended5°-4° at night
- 126 mm · 10 d
Low season, lower prices
April
Not recommended12°2° at night
- 131 mm · 9 d
Low season, lower prices
May
Fair18°7° at night
- 114 mm · 10 d
Low season, lower prices
June
Recommended23°12° at night
- 109 mm · 9 d
Busy, without the crush
July
Recommended26°16° at night
- 83 mm · 8 d
High season, book early
August
Recommended26°15° at night
- 88 mm · 7 d
High season, book early
September
Recommended22°12° at night
- 107 mm · 8 d
Busy, without the crush
October
Recommended15°6° at night
- 149 mm · 9 d
Busy, without the crush
November
Fair9°0° at night
- 150 mm · 9 d
Low season, lower prices
December
Not recommended3°-5° at night
- 144 mm · 11 d
Quiet, then the holidays
Read the twelve months in detail
January. Deep winter: 0 °C at the warmest of the day, -9 °C at night. Expect 10 days of rain in the month (114 mm). Low season: fewer people, lower prices.
February. Deep winter: 2 °C at the warmest of the day, -8 °C at night. Expect 8 days of rain in the month (98 mm). Low season: fewer people, lower prices.
March. Deep winter: 5 °C at the warmest of the day, -4 °C at night. Expect 10 days of rain in the month (126 mm). Low season: fewer people, lower prices.
April. Cool: 12 °C at best, 2 °C at night. Expect 9 days of rain in the month (131 mm). Low season: fewer people, lower prices.
May. Mild, 18 °C in the afternoon and 7 °C early in the morning. Expect 10 days of rain in the month (114 mm). Low season: fewer people, lower prices.
June. Mild, 23 °C in the afternoon and 12 °C early in the morning. Expect 9 days of rain in the month (109 mm). Busy season, without the crush.
July. 26 °C in the afternoon and 16 °C at night. Expect 8 days of rain in the month (83 mm). High season: book early.
August. 26 °C in the afternoon and 15 °C at night. Rain stays light: 88 mm over 7 days. High season: book early.
September. Mild, 22 °C in the afternoon and 12 °C early in the morning. Expect 8 days of rain in the month (107 mm). Busy season, without the crush.
October. Cool: 15 °C at best, 6 °C at night. Expect 9 days of rain in the month (149 mm). Busy season, without the crush.
November. Cool: 9 °C at best, 0 °C at night. Expect 9 days of rain in the month (150 mm). Low season: fewer people, lower prices.
December. Deep winter: 3 °C at the warmest of the day, -5 °C at night. Expect 11 days of rain in the month (144 mm). Quiet at the start of the month, then busier as the holidays approach.
Same season, other ideas
Their best time overlaps with this one: worth comparing before you book.
Frequently asked questions
When is the best time to visit Acadia and Bar Harbor?
June to October: over these months, average highs range from 15 to 26 °C, with 8 days of rain a month on average (2015-2024 averages, Acadia National Park).
Which month should you avoid in Acadia and Bar Harbor?
December: it is the wettest of the months to avoid, with 144 mm over 11 days of rain on average over 2015-2024 at the reference point (Acadia National Park).
What is the hottest month in Acadia and Bar Harbor?
July, with 26 °C on average in the afternoon and 16 °C at night. 2015-2024 averages (Acadia National Park).
What is the coldest month in Acadia and Bar Harbor?
January, with 0 °C at best during the day and -9 °C at night. 2015-2024 averages (Acadia National Park).
What is the driest month in Acadia and Bar Harbor?
July: 83 mm over 8 days of rain, against 150 mm in November, the wettest month.
When is the best time to hike in Acadia and Bar Harbor?
April, June, July, August, September, October: highs between 12 and 29 °C and no more than 9 days of rain a month on 2015-2024 averages (Acadia National Park), the safest windows for walking.
Plan this trip
📒 The free printable Acadia and Bar Harbor guide: itinerary, map, where to sleep→
🧭 When to visit the American West: the country overview→
🗓️ Best time to visit: all our destinations→
Compare with other destinations
Photos: LGalcan / CC BY-SA 4.0 (Wikimedia Commons) · Miguel Hermoso Cuesta / CC BY-SA 4.0 (Wikimedia Commons) · NPS / Victoria Stauffenberg / Public domain (Wikimedia Commons) · NewTestLeper79 / CC BY-SA 4.0 (Wikimedia Commons) · Quintin Soloviev / CC BY 4.0 (Wikimedia Commons)