Costa Rica packs an astonishing variety of climates into a country smaller than West Virginia. You can go from cool, misty cloud forests to sweltering tropical lowlands in a two-hour drive. This diversity is one of the country’s greatest assets — and one of the most important factors in choosing where to live, work, or vacation. Understanding Costa Rica’s microclimates and seasons helps you pick the right region for your lifestyle and pack the right bag.
Two Seasons, Not Four
Forget spring, summer, fall, and winter. Costa Rica has two seasons: verano (dry season, roughly December through April) and invierno (green or rainy season, May through November). Confusingly, locals call dry season “summer” and rainy season “winter” even though the temperature barely changes — what shifts is the rainfall.
Dry season is peak tourist season. Blue skies, minimal rain, and warm temperatures make it ideal for beach trips and outdoor activities. It’s also when rental prices and flight costs peak. The downside: by March and April, the landscape on the Pacific side turns brown and dusty, rivers run low, and some areas face water restrictions.
Rainy season — or “green season” as the tourism industry prefers — brings daily afternoon showers, lush green landscapes, fewer crowds, and lower prices on everything from hotels to rental houses. Most days follow a predictable pattern: sunny mornings, cloud buildup around noon, a heavy rain from 2–5 PM, then clearing skies by evening. Many long-term expats actually prefer green season for the cooler temperatures, dramatic sunsets, and the vibrant plant life. September and October are the exceptions — rain can be heavy and sustained, occasionally causing road closures and localized flooding.
Climate by Region
Elevation is the single biggest factor determining what weather you’ll experience. Costa Rica ranges from sea level to over 12,500 feet (3,820 meters) at Cerro Chirripó, and temperature drops roughly 3.5°F (2°C) for every 1,000 feet of elevation gain. Here’s what to expect in each major region.
Central Valley (San José, Escazú, Heredia, Alajuela)
Elevation: 3,000–4,500 feet (900–1,400 meters). The Central Valley is famous for its “eternal spring” climate — daytime highs of 75–82°F (24–28°C) year-round with cool nights dipping to 60–65°F (15–18°C). No AC needed, no heating needed. It’s arguably the most comfortable climate in the country for daily living and remote work.
During rainy season, expect afternoon showers most days, but mornings are almost always clear. Annual rainfall averages 60–80 inches. The Central Valley has the most defined dry season, with virtually no rain from late December through mid-April. According to Weather Atlas data for San José, the driest months average just 15mm of rainfall, while October (the wettest) averages around 300mm.
Guanacaste & Northern Pacific
Elevation: Sea level to 1,000 feet. This is Costa Rica’s hottest and driest region. Daytime temperatures regularly hit 90–95°F (32–35°C), sometimes exceeding 100°F in March and April. Humidity is lower than other coastal areas, which makes the heat more bearable. Air conditioning is a necessity here, not a luxury — budget accordingly.
Tamarindo, Flamingo, Playas del Coco, and the greater Guanacaste coast have the longest dry season in Costa Rica — often six full months without significant rain. The trade-off is that the landscape turns brown and dusty by February, and water conservation is a real concern. Rainy season here is welcome, transforming the region from savanna-like dryness to lush tropical green.
Nicoya Peninsula (Nosara, Santa Teresa, Montezuma)
Elevation: Sea level to 500 feet. Similar heat to Guanacaste but with slightly more humidity and rainfall. Daytime highs of 85–93°F (29–34°C) year-round. The Nosara and Santa Teresa areas get more rain than northern Guanacaste, keeping them greener year-round. Ocean breezes provide natural cooling, especially in the evenings. Mornings tend to be the most comfortable time for outdoor activity and beach-side coworking.
Central Pacific (Jacó, Manuel Antonio, Dominical, Uvita)
Elevation: Sea level to 500 feet. Hot, humid, and noticeably wetter than the north Pacific. Temperatures average 85–90°F (29–32°C) with high humidity year-round. This coast receives significantly more rainfall — even during “dry” season, occasional showers are possible. The upside: everything is perpetually green and tropical, and the biodiversity here is incredible.
Manuel Antonio and Dominical have a shorter dry season (roughly January through March), while October and November bring the heaviest rains. The Whale Tail at Uvita’s Marino Ballena National Park is most visible during lower tides in dry season — a popular draw for both tourists and potential expats scouting the area.
Caribbean Coast (Puerto Viejo, Cahuita, Tortuguero)
Elevation: Sea level. The Caribbean side follows different weather rules than the rest of Costa Rica. There’s no true dry season — rain is possible any month. However, there are drier windows: February through March and September through October tend to be the least rainy periods. This is the opposite pattern from the Pacific coast, which makes the Caribbean attractive when the Pacific is at its wettest.
Temperatures stay consistently tropical: 82–90°F (28–32°C) with high humidity. The Puerto Viejo area gets roughly 120–150 inches of rain annually — nearly double the Pacific coast. The lush tropical rainforest, reggae culture, and uncrowded beaches are the payoff for all that moisture.
Mountain & Cloud Forest Towns (Monteverde, San Gerardo de Dota, Chirripó)
Elevation: 4,500–8,000+ feet (1,400–2,400+ meters). These highland areas are genuinely cool — daytime temperatures of 65–75°F (18–24°C) and nighttime lows that can drop into the 50s°F (10–14°C). Monteverde is famous for its persistent mist and cloud cover, which creates the ethereal cloud forest ecosystem. Rainfall is high year-round, often as a fine drizzle rather than heavy downpours.
If you dislike tropical heat, the mountains might be your answer. A few expats have settled in towns like San Gerardo de Rivas (near Chirripó) and Boquete-like communities in the Turrialba area, enjoying temperate climates that feel more like the Pacific Northwest than the tropics. According to the World Data climate profile for Costa Rica, highland areas above 2,000 meters regularly see overnight temperatures in the low 50s°F.
Natural Disasters & Weather Events
Costa Rica lies within the hurricane belt but very rarely takes direct hits — the country hasn’t been struck by a major hurricane in modern history. However, indirect effects from Caribbean hurricanes and tropical storms can bring heavy rain, flooding, and landslides, particularly on the Caribbean coast and in mountainous areas during September–November.
Earthquakes are more of a reality. Costa Rica sits where several tectonic plates converge, and small tremors are common. Major earthquakes are rare but have occurred (most recently a 7.6 magnitude in 2012 near Nicoya, which caused damage but no deaths). Building codes have improved significantly, especially in newer construction.
Active volcanoes are monitored by OVSICORI (the national volcanology observatory). Arenal, Poás, and Rincón de la Vieja occasionally show activity but rarely impact populated areas. The bigger concern is lahars (volcanic mudflows) in river valleys near active volcanoes during heavy rain events.
Choosing Your Climate
The beauty of Costa Rica’s size is that your ideal climate is never more than a few hours away. Here’s a quick decision framework:
You love heat and beach life: Guanacaste or Nicoya Peninsula. Driest, hottest, most sunshine. Best for surfers, sun-seekers, and anyone who thrives in warmth.
You want year-round comfort without AC: Central Valley. The most temperate climate, lowest utility bills, and best infrastructure. Ideal for families and anyone who works from home or a coworking space.
You prefer lush tropical green over dry heat: Central Pacific or Caribbean Coast. More rain but more biodiversity, greener landscapes, and a more immersive tropical experience.
You want cool mountain air: Highlands above 4,500 feet. Cooler temperatures, misty mornings, and a completely different vibe from the coast. Best for anyone who misses seasons or can’t handle tropical heat.
For a deeper dive into each region’s lifestyle offerings beyond climate, see our complete guide to living in Costa Rica, which covers housing, costs, infrastructure, and community by area. And when you’re ready to test-drive your chosen climate, browse the Cowork506 directory to find a workspace and start your scouting trip right.