Acadia National Park weather in August
August in Acadia National Park: nice, rainy, with clean air — one of the best months to visit.
#2 of 12 months in Acadia National Park · #105 of 604 destinations to visit in August · comfort 88/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Acadia National Park climate normals — August
| Daytime high | 20°C / 69°F | 😎 nice |
|---|---|---|
| Nighttime low | 16°C / 61°F | |
| Feels like (high) | 21°C / 70°F | |
| Rainfall | 86 mm / 3.4 in | 🌧 rainy |
| Rainy days | 9 days | |
| Humidity | 86% | 💦 very humid |
| Dew point | 15°C / 60°F | |
| Sunshine | 9.9 h/day | |
| Daylight | 14 h | |
| Wind | 17 km/h / 11 mph | |
| Air quality (US AQI) | 37 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Acadia National Park?
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Acadia National Park in August — FAQ
- Is August a good time to visit Acadia National Park?
- August in Acadia National Park: nice, rainy, with clean air — one of the best months to visit. It ranks #2 of 12 months for Acadia National Park on SeasonMap's comfort score (88/100).
- What is the weather like in Acadia National Park in August?
- In August, Acadia National Park averages a daily high of 20.4°C and a low of 16.3°C, with about 86 mm of rain over roughly 9.4 rainy days.
- What is the air quality in Acadia National Park in August?
- Acadia National Park has a mean US Air Quality Index of about 37 in August.