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

In September, Isle Royale National Park averages 16°C high / 13°C low with about 84 mm of rain; Mackinac Island averages 20°C high / 12°C low with about 71 mm.

Isle Royale National Park vs Mackinac Island in September

Isle Royale National Park and Mackinac Island are nearly tied in September — 81 vs 82 on SeasonMap's comfort score. Isle Royale National Park is cool, rainy, clean air; Mackinac Island is nice, a little rain, clean air.

Isle Royale National Park vs Mackinac Island — September climate, side by side

	🇺🇸 Isle Royale National Park	🇺🇸 Mackinac Island
Comfort score	81/100 (A)	82/100 (A)
Feels-like high	14°C	20°C
Avg high / low	16° / 13°	20° / 12°
Rainfall	84 mm	71 mm
Rainy days	10	10
Humidity	81%	78%
Air quality (AQI)	37	41

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

Month by month

Isle Royale National Park vs Mackinac Island in September — FAQ

Is September better in Isle Royale National Park or Mackinac Island?: Isle Royale National Park and Mackinac Island are nearly tied in September — 81 vs 82 on SeasonMap's comfort score. Isle Royale National Park is cool, rainy, clean air; Mackinac Island is nice, a little rain, clean air.
What is the weather like in Isle Royale National Park vs Mackinac Island in September?: In September, Isle Royale National Park averages 16°C high / 13°C low with about 84 mm of rain; Mackinac Island averages 20°C high / 12°C low with about 71 mm.