Weather will likely play an important role when you plan your trip to Bouna, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually February and March with an average temp of 86°F, while the coldest months are January and August with an average of 80°F. The rainiest months in Bouna are August, September, July, and October, with each month seeing an average of 8 inches of rainfall.