Planning for the weather is an important factor for making your trip to Bau-Bau a success, especially when you're splurging. The hottest months are usually November and October, with an average temperature of 27°C, while the coldest months are August and September, with an average of 26°C. The rainiest months in Bau-Bau are February, March, December and January, with each month seeing an average of 349 mm of rainfall.