Weather is probably a major factor when you plan your trip to Ranna, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually April and June, with an average temperature of 28°C, while the coldest months are January and February, with an average of 27°C. The rainiest months in Ranna are November, December, October and April, with each month seeing an average of 195 mm of rainfall.