Taking into account the local weather in Nias is an important factor for planning your visit, especially if you plan to spend your trip poolside. The hottest months are usually May and March with an average temp of 82°F, while the coldest months are November and October with an average of 81°F. The rainiest months in Nias are November, October, December, and April, with each month seeing an average of 20 inches of rainfall.