Acadia National Park weather in May
May in Acadia National Park: cool, a little rain, with clean air — an excellent time to visit.
#4 of 12 months in Acadia National Park · #215 of 604 destinations to visit in May · comfort 84/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Acadia National Park climate normals — May
| Daytime high | 13°C / 55°F | 🙂 cool |
|---|---|---|
| Nighttime low | 7°C / 45°F | |
| Feels like (high) | 11°C / 52°F | |
| Rainfall | 79 mm / 3.1 in | 🌦 some rain |
| Rainy days | 9 days | |
| Humidity | 74% | 💧 humid |
| Dew point | 6°C / 42°F | |
| Sunshine | 10 h/day | |
| Daylight | 14.8 h | |
| Wind | 21 km/h / 13 mph | |
| Snowfall | 0.8 cm / 0.3 in | |
| Air quality (US AQI) | 38 | 🍃 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 May — FAQ
- Is May a good time to visit Acadia National Park?
- May in Acadia National Park: cool, a little rain, with clean air — an excellent time to visit. It ranks #4 of 12 months for Acadia National Park on SeasonMap's comfort score (84/100).
- What is the weather like in Acadia National Park in May?
- In May, Acadia National Park averages a daily high of 12.7°C and a low of 7.1°C, with about 78.6 mm of rain over roughly 9 rainy days.
- What is the air quality in Acadia National Park in May?
- Acadia National Park has a mean US Air Quality Index of about 38 in May.