The climate is tropical. Hot season (December to April); rainy season (May to November); cooler in highlands. Because Costa Rica is located between 8 and 12 degrees north of the
Equator, the climate is
tropical year round. However, the country has many
microclimates depending on elevation, rainfall, topography, and by the geography of each particular region. Costa Rica's seasons are defined by how much rain falls during a particular period. The year can be split into two periods, the dry season known to the residents as summer (), and the rainy season, known locally as winter (). The "summer" or dry season goes from December to April, and "winter" or rainy season goes from May to November, which almost coincides with the
Atlantic hurricane season, and during this time, it rains constantly in some regions. The location receiving the most rain is the Caribbean slopes of the
Cordillera Central mountains, with an annual rainfall of over . Humidity is also higher on the Caribbean side than on the Pacific side. The mean annual temperature on the coastal lowlands is around , in the main populated areas of the Cordillera Central, and below on the summits of the highest mountains. }}
Climate change Costa Rica is highly vulnerable to extreme weather events, which can be exacerbated by
climate change. The majority of Costa Rica's population (78%) and economic activity (80% of
GDP) are concentrated in regions highly vulnerable to various natural hazards, such as floods, landslides, cyclones, storm surges, and rising sea levels. Sea levels are rising along both of Costa Rica's coasts, increasing the vulnerability of low-lying areas to storm surges and erosion with consequences for fisheries, port infrastructure and tourism. The country is facing increasing temperatures (especially at higher elevations), and changing rainfall patterns resulting in increased risk of drought along the Pacific slope and flooding in all regions of the country. Costa Rica has committed to reducing its
greenhouse gas emissions by 9.11 MtCO2e by 2030 and
net zero by 2050, announced in its National Decarbonisation Plan (NDP). According to Climate Action Tracker, Costa Rica has made good progress toward its climate goals. == Flora and fauna ==