Bar Harbor Weather in August
With daytime temperatures of 24°C (75°F) and nighttime lows of 15°C (59°F), August in Bar Harbor brings high temperatures during the day. Do keep in mind that quite a bit of rainfall is typical. Around 96 mm (3.8 in) falls on average.
Rainfall in Bar Harbor in August
Typically around 10 days of rainfall are expected, averaging 96 mm (3.8 in) for the month. When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.
Temperature in Bar Harbor in August
Weather in Bar Harbor is at its excellent in August. Highs reach 24°C (75°F), while nights settle around 15°C (59°F). The month of August belongs to the summer season. The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. With overnight lows of 15°C (59°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.So this is a great month to visit if you prefer dry days with pleasant temperatures.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Bar Harbor's climate page.
Bar Harbor Temperature in August
Min Temperature
15°C (59°F)
Max Temperature
24°C (75°F)
Chance of Rain
32%
Precipitation
96 mm (3.8 in)
Rainy days
10 days
Daily Historical Temperatures
49-year average (1976-2025)
Based on our historical records, temperatures in Bar Harbor typically stay consistent throughout August, with daily highs averaging around 24°C (75°F). Nights are pleasant, with lows typically ranging from 13°C (55°F) to 16°C (61°F).
Average temperatures in August
Historical weather for Bar Harbor in August
Browse day-by-day weather records for Bar Harbor spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Bar Harbor historical weather extremes in August
Based on weather observations in Bar Harbor between 1998 and 2025, these are the recorded extremes during August.
- The warmest day in August was on August 13, 2002, with a maximum of 34°C (93°F).
- On August 29, 2009, Bar Harbor saw its coldest August day with temperatures maxing out at 13°C (55°F).
- The coldest night in August in Bar Harbor was on August 28, 2009, with a minimum of 6°C (43°F).
Best Places in the United States of America in August
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in August →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Bar Harbor in August
For Bar Harbor in August, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. High rain levels are expected, so pack waterproof gear and an umbrella or poncho.What To Do in Bar Harbor in August
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Bar Harbor's climate page.
See the full Bar Harbor climate overview or explore weather in the United States of America.
