If you’re hoping to get lost in the rain on your romantic getaway, take a look at these details about year-round temperatures in DeBary: The hottest months are usually August and July, with an average temperature of 27°C, while the coldest months are January and February, with an average of 18°C. The rainiest months in DeBary are August, September, July and June, with each month seeing an average of 196 mm of rainfall.