Taking into account the local weather in Namisuni is an important factor for planning your visit, especially if you plan to spend your trip poolside. The hottest months are usually February and March with an average temp of 72°F, while the coldest months are June and July with an average of 69°F. The rainiest months in Namisuni are April, May, March, and November, with each month seeing an average of 14 inches of rainfall.