Taking the local weather in Rabaul into account is an important factor for planning your visit, especially if you plan to spend your trip by the pool. The hottest months are usually May and October, with an average temperature of 27°C, while the coldest months are August and September, with an average of 27°C. The rainiest months in Rabaul are March, April, December and February, with each month seeing an average of 415 mm of rainfall.