You'll likely spend much of your trip indoors, but if you want to see more of the area, taking a look at local weather data can help you. The hottest months are usually May and June with an average temp of 83°F, while the coldest months are February and March with an average of 82°F. The rainiest months in Koror are July, June, May, and August, with each month seeing an average of 16 inches of rainfall.