Forests in the Northwest province of Guanacaste is a deciduous tree, not because of seasonal changes in temperature, but because of seasonal fluctuations in humidity. Terms of Costa Rica does not fall within the traditional terminology of new residents in Costa Rica, and is easier to implement in the summer of local terminology and differences between these two periods Invierno. The average annual temperature in most parts of the country is a C-20 in the middle 70 F the extent of the average cost of a higher temperature about 30 C 90 F and the peaks of the mountains is a little cold.