Taking into account the local weather in Jayapura is an important factor for planning your visit, especially if you plan to spend your trip poolside. The hottest months are usually October and November with an average temp of 78°F, while the coldest months are August and July with an average of 77°F. The rainiest months in Jayapura are December, March, April, and November, with each month seeing an average of 15 inches of rainfall.