Costa Rica is a year-round destination and contains many different micro climate zones. The mountain ranges, which cross the country from the northwest to southeast, act as a meteorological divide and are responsible for a Pacific and a Caribbean climate. Interestingly, the climate zones behave in exactly opposite ways. One distinguishes between a dry and a green season in Costa Rica. During the green season, heavy rain showers occur daily. However, two rainy days in a row are very uncommon for Costa Rica and only occur during the wettest time of the season. 


Pacific side & central valley with the capital city San José Caribbean side, including north zone with Sarapiqui and Arenal volcano
Dry months December – April/May September – October
Green season May – November November – August
Rainiest months September – November December, January and July
Best time to travel December – May and July September, October, February – June


Region day night
Central valley and mountain ranges 20 – 27 C 15 – 20 C
Coasts and flatland 25 – 35 C 20 – 30 C

On volcanoes and in higher altitudes, it can be a bit chillier during the day.