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.

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For a detailed overview over the year and the best time to visit the United States of America, check out our Acadia National Park's climate page.

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  

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.

Cycling

9/10

Walking

9/10

Camping

8/10

Outdoor sports

9/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Acadia National Park's climate page.

More climate data for Acadia National Park

Temperature Rainfall

See the full Acadia National Park climate overview or explore weather in the United States of America.