Rainy season is from April to October, with May and October being the wettest months. Hotel prices will be cheaper during this time, but if you are interested in take a trip from Jimenez to Corcovado National Park, be warned that some trails may be closed during low season.
High season is from November to March. Many high-end lodges have the highest prices during the month of December.
From June 19-21, 2009 the Rainforest Aid Summer Solstice Music Festival will be held in La Palma and will feature more than 15 different musical groups. The festival is being held as a fundraiser to help preserve the rain forests of the Osa Peninsula, especially Corcovado National Park.