Weather will likely play an important role when you plan your trip to Aitape, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually October and November with an average temp of 75°F, while the coldest months are August and July with an average of 74°F. The rainiest months in Aitape are March, April, December, and January, with each month seeing an average of 18 inches of rainfall.