Taking into account the local weather in Sipí is an important factor for planning your visit, especially if you plan to spend your trip poolside. The hottest months are usually August and September with an average temp of 67°F, while the coldest months are January and September with an average of 66°F. The rainiest months in Sipí are May, April, June, and November, with each month seeing an average of 22 inches of rainfall.