Costa Rica Weather in December offers a perfect blend of pleasant temperatures and minimal rainfall, making it an ideal time to explore the country’s diverse regions, from the Pacific Coast to the Caribbean Coast.
This article provides a detailed overview of Costa Rica’s weather patterns in December, including the country’s geographical location, trade winds, climate zones, and regional variations. We’ll also delve into the average temperature and rainfall in different cities, the impact of the “Green Season” on tourism, and tips on how to prepare for Costa Rica’s weather in December.
Average Temperature and Rainfall in Costa Rica in December

December in Costa Rica is characterized by a dry and cool climate, with temperatures gradually dropping as the month progresses. This period is an excellent time to visit the country, thanks to the pleasant weather conditions and the lush green landscapes that abound during the dry season.
Average Temperature in Major Cities of Costa Rica in December
The table below illustrates the average high and low temperatures in several major cities in Costa Rica, including the capital city San Jose, and other popular destinations like Liberia, Alajuela, and Limon.
| City | Average High Temperature (°C) | Average Low Temperature (°C) |
|---|---|---|
| San Jose | 23.5 | 14.5 |
| Liberia | 26.5 | 19.5 |
| Alajuela | 24.5 | 15.5 |
| Limon | 25.5 | 18.5 |
Average Rainfall in Costa Rica in December
Costa Rica experiences a distinct wet and dry season, with December falling under the dry season. The country’s geography, with its numerous mountains and valleys, contributes to a varied climate across different regions.
The average rainfall in December is relatively low, with most parts of the country receiving between 10-20 mm of rainfall throughout the month. This dry spell has a significant impact on the country’s agriculture and wildlife. Some key points to note about the rainfall in December include:
- Low rainfall allows farmers to cultivate crops without worrying about flooding, leading to a higher crop yield.
- The dry climate makes it easier for tour operators to offer hiking and outdoor activities in various national parks, without the risk of rain.
- The dry season also leads to an increase in bird migration, making it an excellent time for nature enthusiasts.
The “Green Season” and “Dry Season” in Costa Rica
Costa Rica has a distinct climate pattern, with the “Green Season” occurring from May to November and the “Dry Season” from December to April. These two seasons have a significant impact on the country’s tourism industry.
During the Green Season, the rainforests are lush, and the vegetation is vibrant, attracting tourists who love nature and wildlife. On the other hand, the Dry Season is characterized by low humidity and minimal rainfall, making it perfect for outdoor activities like hiking and exploring national parks.
The table below illustrates the average daily sunshine hours in Costa Rica during December.
Average Daily Sunshine Hours in December
7 hours of direct sunlight
The graph below shows the average daily sunshine hours in Costa Rica, which peaks at around 7 hours in December.
This amount of sunshine makes it perfect for outdoor activities, like surfing, beach visits, and hiking in various national parks.
In the chart below, you can see the average daily sunshine hours, with December highlighted.
Please note that the actual sunshine hours may vary from year to year due to weather patterns.
Regional Variations in Costa Rica Weather in December

Costa Rica’s weather in December is marked by distinct regional variations, resulting from the country’s unique geography and microclimates. From the driest savannas to the lush rainforests, each region boasts a unique climate that is worth exploring.
The country’s varied climate systems are influenced by the trade winds and the Intertropical Convergence Zone (ITCZ), creating a diversity of microclimates. In this article, we will delve into the regional variations of Costa Rica’s weather in December, highlighting the characteristics of each area.
The Central Valley
The Central Valley is Costa Rica’s most populous region, encompassing the capital city of San José. This valley is characterized by a mild climate, with average high temperatures ranging from 77°F (25°C) to 82°F (28°C) in December. The valley’s climate is influenced by the surrounding mountains, which create a rain shadow effect, resulting in a relatively dry climate.
The Pacific Coast
The Pacific Coast of Costa Rica stretches from the city of Limón in the east to the border with Nicaragua in the west. This region experiences a tropical climate, with high temperatures and high humidity levels throughout the year. In December, the average high temperature along the Pacific Coast is around 87°F (31°C), while the average low temperature is around 70°F (21°C). This region receives significant rainfall in December, with an average of 10-15 inches (25-38 cm) along the coast and more in the surrounding mountains.
The Caribbean Coast
The Caribbean Coast of Costa Rica includes the provinces of Limón and Puntarenas. This region is known for its lush rainforests and coral reefs, creating a tropical climate with high temperatures and high humidity levels. In December, the average high temperature along the Caribbean Coast is around 85°F (29°C), while the average low temperature is around 68°F (20°C). This region receives significant rainfall in December, with an average of 10-12 inches (25-30 cm) along the coast.
The Mountains
Costa Rica’s mountains are a significant feature of the country’s geography, with several volcanoes and mountains rising above 10,000 feet (3,048 meters) in elevation. The climate in the mountains varies greatly depending on the elevation, with temperatures decreasing as the elevation increases. In December, the average high temperature in the mountains ranges from 55°F (13°C) to 60°F (16°C), while the average low temperature ranges from 40°F (4°C) to 45°F (7°C). The mountains receive significant rainfall in December, with an average of 20-30 inches (50-76 cm) in the higher elevations.
The Osa Peninsula
The Osa Peninsula is a unique region in Costa Rica, known for its lush rainforests and diverse wildlife. The peninsula is located in the southern part of the country, near the Panamanian border. The climate in the Osa Peninsula is characterized by high temperatures and high humidity levels, with an average high temperature of 85°F (29°C) and an average low temperature of 68°F (20°C) in December. The region receives significant rainfall in December, with an average of 15-20 inches (38-51 cm).
The Osa Peninsula is home to several national parks and wildlife refuges, including Corcovado National Park, which is one of the most biodiverse places on the planet. The peninsula’s unique climate and geography create a variety of microclimates, with some areas receiving as much as 400 inches (1,000 mm) of rainfall per year.
One of the most significant benefits of the Osa Peninsula’s climate is its support for the region’s incredible biodiversity. The peninsula is home to a wide range of plant and animal species, including monkeys, sloths, toucans, and jaguars. The region’s lush rainforests and diverse wildlife create a unique ecosystem that is unlike anywhere else in the world.
In summary, the Osa Peninsula’s climate is characterized by high temperatures and high humidity levels, with significant rainfall throughout the year. The region’s unique climate and geography create a variety of microclimates, supporting an incredible array of plant and animal species.
The Guanacaste Province
The Guanacaste Province is the driest region in Costa Rica, located in the northwestern part of the country. The province is characterized by a dry tropical savanna climate, with an average high temperature of 88°F (31°C) and an average low temperature of 64°F (18°C) in December. The region receives relatively little rainfall in December, with an average of 2-4 inches (5-10 cm) along the coast.
The Guanacaste Province is known for its beautiful beaches, scenic coastline, and dry climate, making it a popular destination for tourists. The region’s dry climate is ideal for outdoor activities such as surfing, snorkeling, and hiking, with clear skies and warm weather making it perfect for exploring the area.
One of the benefits of the Guanacaste Province’s dry climate is its support for the region’s agriculture. The province is known for its coffee plantations, which take advantage of the dry climate to produce high-quality coffee. The region’s dry climate also allows for a wide range of crops to be grown, including citrus fruits and avocados.
In comparison to the rest of the country, the Guanacaste Province has a unique climate that is drier and warmer than the rest of Costa Rica. The region’s dry climate is characterized by low humidity levels and clear skies, making it an ideal destination for tourists and outdoor enthusiasts.
The Arenal Volcano Region
The Arenal Volcano Region is located in the northern part of Costa Rica, in the province of Alajuela. The region is characterized by a tropical climate, with an average high temperature of 84°F (29°C) and an average low temperature of 63°F (17°C) in December. The region receives significant rainfall in December, with an average of 10-12 inches (25-30 cm).
The Arenal Volcano is one of the most iconic landmarks in Costa Rica, known for its stunning views and hot springs. The region’s unique climate is influenced by the volcano’s proximity to the surrounding mountains, creating a microclimate that is distinct from the rest of the country.
The Arenal Volcano Region is a popular destination for tourists, with activities such as hiking, wildlife watching, and hot spring soaking available year-round. The region’s unique climate and geography create a variety of microclimates, supporting an incredible array of plant and animal species.
In comparison to the rest of the country, the Arenal Volcano Region has a unique climate that is influenced by the volcano’s proximity to the surrounding mountains. The region’s climate is characterized by high temperatures and high humidity levels, with significant rainfall throughout the year.
The combination of the region’s unique climate and geography creates a variety of microclimates, supporting an incredible array of plant and animal species. The region’s diverse wildlife includes monkeys, sloths, toucans, and jaguars, making it a nature lover’s paradise.
In summary, the Arenal Volcano Region’s climate is characterized by tropical temperatures and high humidity levels, with significant rainfall throughout the year. The region’s unique climate and geography create a variety of microclimates, supporting an incredible array of plant and animal species.
Costa Rica Weather Forecast for December: Costa Rica Weather In December

December in Costa Rica brings a mix of sunshine and rain, making it an ideal time to explore the country’s lush rainforests and exotic wildlife. As we dive into the weather forecast for the month, you’ll find a comprehensive overview of temperature, rainfall, and sunshine hours across the different regions of Costa Rica.
Weather Forecast Table
| Region | Temperature (°C) | Rainfall (mm) | Sunshine Hours |
|---|---|---|---|
| Central Valley | 24-28 | 200-300 mm | 8-10 hours/day |
| North (Guancaste) | 27-30 | 100-150 mm | 10-12 hours/day |
| South (Puntarenas) | 25-28 | 300-400 mm | 6-8 hours/day |
| Caribbean Coast | 26-29 | 400-500 mm | 5-7 hours/day |
Long-term Climate Trends and Climate Change Mitigation Efforts
Costa Rica has been actively working to mitigate the impact of climate change on its weather. The country has implemented various policies and initiatives to reduce greenhouse gas emissions, promote renewable energy, and protect its natural resources. One notable example is the “Green Economy” program, which aims to transition the country’s economy towards a more sustainable and environmentally friendly model.
“Climate change is a global problem that requires a global response. Costa Rica is committed to playing its part in reducing greenhouse gas emissions and protecting its natural resources for future generations.” – Costa Rican Government
El Niño and Its Impact on Costa Rica’s Weather, Costa rica weather in december
El Niño is a complex weather phenomenon that refers to the warming of the Pacific Ocean waters near the equator. This warming has a significant impact on the weather patterns in Costa Rica, particularly in the months of December, January, and February. During an El Niño event, Costa Rica can expect heavier rainfall, more frequent storms, and increased temperatures.
Regional Variations in El Niño’s Effects
The impact of El Niño on Costa Rica’s weather varies depending on the region. The Central Valley and North regions tend to experience more intense rainfall and increased temperatures, while the South region and Caribbean Coast tend to receive more frequent storms and heavier rainfall.
Tips for Preparing for Costa Rica’s Weather in December
When traveling to Costa Rica in December, it’s essential to be prepared for the country’s unpredictable weather. Here are some tips to help you make the most of your trip:
- Pack layers of clothing, including a waterproof jacket and umbrella, to be prepared for rain showers.
- Research and book accommodations that offer reliable Wi-Fi and access to important amenities, such as restaurants and shops.
- Plan outdoor activities like hiking and ziplining for the mornings when the weather is typically clearer.
- Consider purchasing travel insurance to protect yourself against trip cancellations or interruptions due to weather-related issues.
By being prepared for the weather in Costa Rica, you can ensure a safe and enjoyable trip to this beautiful country.
Closing Summary
In conclusion, Costa Rica’s weather in December is characterized by pleasant temperatures, minimal rainfall, and abundant sunshine. Whether you’re a nature lover, adventure seeker, or simply looking for a relaxing getaway, Costa Rica has something to offer in December. With this comprehensive guide, you’ll be well-prepared to make the most of your trip and experience the best of Costa Rica’s weather in December.
Detailed FAQs
What is the average temperature in San Jose in December?
The average high temperature in San Jose in December is around 77°F (25°C), while the average low temperature is around 64°F (18°C).
Is December a good time to visit Costa Rica?
Yes, December is a great time to visit Costa Rica, with pleasant temperatures, minimal rainfall, and abundant sunshine.
What is the dry season in Costa Rica?
The dry season in Costa Rica typically runs from December to April, with minimal rainfall and dry weather conditions.
Can I expect rain in Costa Rica in December?
No, December is a dry month in Costa Rica, with minimal rainfall and dry weather conditions.