If you’re looking forward to lots of outings with your partner, take a look at these details about year-round temperatures in Yona: The hottest months are usually June and July, with an average temperature of 28°C, while the coldest months are February and March, with an average of 27°C. The rainiest months in Yona are August, September, October and July, with each month seeing an average of 410 mm of rainfall.