Taking the local weather in Poasito into account is an important factor for planning your visit, especially if you plan to spend your trip by the pool. The hottest months are usually March and April, with an average temperature of 21°C, while the coldest months are January and February, with an average of 20°C. The rainiest months in Poasito are October, June, September and August, with each month seeing an average of 555 mm of rainfall.