Taking into account the local weather in Sinajana is an important factor for planning your visit, especially if you plan to spend your trip poolside. The hottest months are usually June and July with an average temp of 83°F, while the coldest months are February and March with an average of 81°F. The rainiest months in Sinajana are August, September, October, and July, with each month seeing an average of 16 inches of rainfall.