Choosing the best month for your Costa Rica trip is all about your preferences. Costa Rica has a unique climate that makes it an attractive vacation spot throughout the year. While the weather is warm and sunny during the dry seasons, Costa Rica experiences a lot of rain during the wet months. December to April is generally considered the best time to visit because these are the driest months with the best weather. This also means that December to April is the busiest time of year in terms of tourism, so you may want to avoid these months if you’re looking for smaller crowds.