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.
As the month progresses, the cloud coverage increases, starting at 29% on September 1 st and increasing to 32% on September 11 th, 35% on September 21 st and 37% on September 30 th. The average sea temperature is very warm at 25Â°C, thanks to the waters retaining the heat from summer.t this time of the year, the average temperature starts off at 23-24Â°C at the beginning of the month and gradually drops until it reaches 20Â°C in the final few days. During September, the daily lows range slightly from 15Â°C to 18Â°C, dropping below 11Â°C or exceeding 22Â°C very rarely â only one day out of every ten.