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.
During this month, the average daytime temperature drops down to 22 degrees Celsius while the seawater temperature still retains summertime warmth at 25 degrees. October sees temperature lows drop to about 19 degrees and high peaks reaching 25 degrees Celsius.