The Untamed Beauty of Acadia National Park
Explore Acadia National Park on Maine’s Mount Desert Island with scenic drives, hiking, and views from Cadillac Mountain, the tallest peak on the coast.
Acadia National Park Weather in September
Acadia National Park in September sees pleasant temperatures, with highs around 21°C (70°F) and overnight lows of 12°C (54°F). Rainfall is fairly high at around 97 mm (3.8 in) on average, so pack waterproofs just in case.
Rainfall in Acadia National Park in September
Typically, you can expect about 10 days of rain this month, with 97 mm (3.8 in) on average. The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.
Temperature in Acadia National Park in September
Weather in Acadia National Park is at its excellent in September. Highs reach 21°C (70°F), while nights settle around 12°C (54°F). Experience the summer season in September. A light jacket or extra layer can be useful, especially outside the warmest hours of the day. Nights drop to around 12°C (54°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.If you're a fan of comfortable temperatures and drier conditions, September is a great time to visit.
Acadia National Park Temperature in September
Min Temperature
12°C (54°F)
Max Temperature
21°C (70°F)
Chance of Rain
33%
Precipitation
97 mm (3.8 in)
Rainy days
10 days
Acadia National Park Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Acadia National Park - and find the best time to visit.
Best Places in the United States of America in September
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 September →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Acadia National Park in September
For Acadia National Park in September, 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 Acadia National Park in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Cycling9/10 -
Walking9/10 -
Camping8/10 -
Outdoor sports9/10
Acadia National Park 3-Day Forecast
More climate data for Acadia National Park
See the full Acadia National Park climate overview or explore weather in the United States of America.
Popular in September
Where to go in September - average daytime high across popular destinations.
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The Untamed Beauty of Acadia National Park
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