What is the weather like in Acadia National Park vs Mackinac Island in September?

In September, Acadia National Park averages 18°C high / 11°C low with about 93 mm of rain; Mackinac Island averages 20°C high / 12°C low with about 71 mm.

Acadia National Park vs Mackinac Island in September

Acadia National Park is the better pick in September — 87 vs 82 on SeasonMap's comfort score. Acadia National Park is nice, rainy, clean air, while Mackinac Island is nice, a little rain, clean air.

Acadia National Park vs Mackinac Island — September climate, side by side

	🇺🇸 Acadia National Park	🇺🇸 Mackinac Island
Comfort score	87/100 (A)	82/100 (A)
Feels-like high	18°C	20°C
Avg high / low	18° / 11°	20° / 12°
Rainfall	93 mm	71 mm
Rainy days	7	10
Humidity	81%	78%
Air quality (AQI)	37	41

Monthly climate normals (ERA5 reanalysis). Comfort scores are SeasonMap estimates.

Month by month

Acadia National Park vs Mackinac Island in September — FAQ

Is September better in Acadia National Park or Mackinac Island?: Acadia National Park is the better pick in September — 87 vs 82 on SeasonMap's comfort score. Acadia National Park is nice, rainy, clean air, while Mackinac Island is nice, a little rain, clean air.
What is the weather like in Acadia National Park vs Mackinac Island in September?: In September, Acadia National Park averages 18°C high / 11°C low with about 93 mm of rain; Mackinac Island averages 20°C high / 12°C low with about 71 mm.