An amount below 100 means Dayton, Ohio is cheaper than the US average. A cost of living index above 100 means Dayton, Ohio is more expensive.
Sea Island, GA Weather. The average temperature of Sea Island is 67.50Â°F, which is much higher than the Georgia average temperature of 62.30Â°F and is much higher than the national average temperature of 54.45Â°F. Historical Weather.
Mackinac Island sea water temperatures peak in the range 14 to 20Â°C (57 to 68Â°F) on around the 14th of August and are at their minimum on about the 22nd of March, in the range 1 to 3Â°C (34 to 37Â°F).