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.
In recent years, average temperatures in the county seat of Rock Island have ranged from a low of 13 Â°F (â11 Â°C) in January to a high of 85 Â°F (29 Â°C) in July, although a record low of â22 Â°F (â30 Â°C) was recorded in February 1996 and a record high of 103 Â°F (39 Â°C) was recorded in July 2006.