The driest months to visit Costa Rica are December, January, February, March, and April. This period is known as the "Verano" (Summer) or the dry season, and it offers the most consistent sunshine and the lowest humidity of the year. During these months, the Pacific coast and the Central Valley experience very little rainfall, making it the ideal time for beach vacations, hiking in the cloud forests, and wildlife spotting, as animals tend to congregate around dwindling water sources. However, it is important to remember that this is also peak tourist season, meaning popular destinations like Manuel Antonio and Arenal will be more crowded, and hotel prices will be at their highest. If you are visiting the Caribbean coast (such as Puerto Viejo), the weather patterns are slightly different, with September and October often being the driest months there. For most travelers, the "winter" months of the Northern Hemisphere provide the perfect tropical escape to Costa Rica's sunny shores, though booking well in advance is essential for any trip planned during this bright and bustling window.