Johns River, to the west of the Ten Mile Ridge, or the St. Sebastian River to the west of the Atlantic Coastal Ridge, and during periods of heavy rainfall, east through gaps in the ridges. Now, a complex series of canals and ditches has altered what would be the natural drainage of the county. According to the USDA-NRCS Soil Survey of Indian River County the mean annual temperature is 74 degrees Fahrenheit. Temperatures vary from an average daily minimum of 52 degrees Fahrenheit in January to an average daily maximum in July of 90 degrees Fahrenheit. Below freezing temperatures occur one to three times per season.
Some years pass without freezes occurring.
The average annual rainfall is approximately 52 inches.