Climate & Weather Guide · Costa RicaClimate & Weather Guide in Costa Rica
Climate zones, seasonal temperatures, rainfall patterns, and best travel times
Costa Rica is a small but climatically diverse country with a strongly tropical character, shaped by elevation, mountain barriers, and exposure to both the Pacific and Caribbean seas. Most lowland areas are hot and humid year-round, while the Central Valley and higher mountain zones are noticeably cooler and more comfortable for many expats. The national climate is dominated by tropical wet, tropical monsoon, tropical savanna, and subtropical highland conditions under Köppen classification. Recent national-average temperature data shows a very warm baseline, and the country’s rainfall is abundant overall, with sharp regional contrasts between drier Pacific slopes and wetter Caribbean and mountain areas.
Summer Average
20-32°C
Winter Average
10-26°C
Climate Types
Tropical and Subtropical highland and Tropical savanna and Tropical monsoon and Tropical wet
1500-7000 mm
1,800-2,800 hrs/yr
75-90%
Regional Climate Variations
Central Valley and Highlands
This is the most livable climate zone for many residents and expats because elevation moderates temperatures and reduces the heavy coastal heat. Cities and towns around San José, Alajuela, Heredia, and Cartago typically feel spring-like during the day and cool at night, especially at higher elevations. Köppen climates here are mainly subtropical highland, with milder temperatures than the coasts and a pronounced wet season from May to November. Rainfall is substantial but generally less extreme than on the Caribbean side, and the climate is often described as comfortable, green, and fairly stable through the year.
Mild, green, and comfortable most of the year, with cooler nights and a clear wet-dry rhythm that many expats find easier than the coastal heat.
Pacific Coast and Nicoya Peninsula
The Pacific side is warmer and more seasonal than the Central Valley, with a clearer dry season and strong sunshine in the first part of the year. The northern Pacific, including Guanacaste and the Nicoya Peninsula, is the driest major region in the country and is attractive for people who prefer more sun and less persistent rain. Temperatures are high in the lowlands, but sea breezes and long dry stretches make the climate feel more predictable. This zone includes tropical savanna and tropical monsoon conditions depending on exact location and distance from the coast.
Hot, sunny, and more seasonal than the rest of the country, with a strong dry season that suits beach living and outdoor lifestyles.
Caribbean Coast
The Caribbean coast is the wettest and most consistently humid part of Costa Rica, with rainfall spread through much of the year rather than concentrated into one short wet season. Places such as Limón and nearby lowland areas are lush, warm, and often cloudier than the Pacific side. Köppen conditions here are typically tropical wet or tropical monsoon, which means frequent showers, sticky humidity, and very green landscapes. For residents, this region offers a distinctly tropical environment, but it is less suited to people who dislike dampness or frequent rain.
Warm, humid, and rain-rich throughout much of the year, with a lush tropical feel and little true dry season.
Northern Lowlands and Inland Lowlands
The northern lowlands and interior low-lying areas are hot year-round and tend to be more humid than the Central Valley, though not as relentlessly wet as the Caribbean slope. This broad zone includes agricultural and forested landscapes where heat, humidity, and seasonal rainfall define daily life. Köppen climates are mainly tropical savanna or tropical monsoon, depending on local rainfall totals and the strength of the dry season. For expats, the appeal is often lower living costs and tropical scenery, but the tradeoff is greater heat and a more demanding climate for those unused to humid weather.
Warm to hot with tropical humidity, greener during the wet season and noticeably drier in selected inland pockets.
Costa Rica is a tropical country with major climate differences over short distances, ranging from cooler highland valleys to hot, humid rainforests and coastlines. For many residents and expats, the Central Valley offers the most comfortable year-round conditions, while the Pacific coast appeals to those who prefer more sun and a stronger dry season.
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