Last updated: August 21, 2025
In December, Jaco, Costa Rica experiences a warm tropical climate, with maximum temperatures reaching 29°C (84°F) and an average of 27°C (80°F). Visitors can expect pleasant evenings, as nighttime temperatures rarely drop below 24°C (76°F). While the allure of sunny beach days is strong, December also brings 125 mm (4.9 in) of rainfall over 16 days, contributing to the region's lush greenery. Humidity levels hover around 72%, giving the atmosphere a refreshing, balmy feel. This unique blend of warmth and moisture makes December an enticing time to visit Jaco, where nature thrives and vibrant experiences await.
In December, Jaco, Costa Rica, continues to bask in warm tropical weather, making it an appealing destination for holiday travelers. With minimum temperatures around 24°C (76°F) and average highs reaching up to 29°C (84°F), the climate remains welcoming as the year draws to a close. This month marks a slight dip in the minimum temperature compared to earlier months, yet the average remains consistent, hovering around 27°C (80°F). As the peak of the dry season approaches, expect plenty of sunshine and pleasant breezes that invite visitors to enjoy beach activities and explore the vibrant surroundings. Despite December's slight cooling trend, the warmth of Jaco ensures that it retains its charm as a perfect tropical getaway.
In December, Jaco, Costa Rica experiences a notable transition as the rainy season begins to wind down. With 125 mm (4.9 in) of precipitation falling over 16 days, the month marks a reduction from the heavy downpours of previous months, particularly October's staggering 638 mm (25.1 in). Although December still sees a fair amount of rain, the overall totals reflect a shift towards drier conditions that pave the way for sunnier days ahead. This trend signals the beginning of the dry season, making it an ideal time for visitors to enjoy Jaco's stunning beaches and vibrant landscape without the constant interruption of rain.
December in Jaco, Costa Rica sees humidity levels settling at a comfortable 72%, marking a transition from the higher levels experienced in the preceding months. Historically, the beginning of the year shows a more moderate humidity, with January and February both hovering around 68%. As the year progresses, particularly from June through August, the humidity peaks dramatically, reaching a high of 85% in July. However, as the rainy season wanes into December, the humidity gradually eases, creating a refreshing atmosphere that is perfect for enjoying the region's lush landscapes and vibrant beach life. Overall, December offers a more pleasant and tolerable humidity, making it an ideal time to visit Jaco.
In December, Jaco, Costa Rica experiences a very high UV Index of 10, signaling a slight drop from the extreme levels seen in the previous months. While this index still necessitates cautious sun exposure, with a burn time of 15 minutes, it indicates a gradual transition as the year draws to a close. Observing trends from earlier months, the UV Index remained consistently high, peaking at 14 in both April and May, with 10 minutes being the standard burn time across most of the year. Visitors in December should still be mindful of the strong sun, but this slight decrease offers a marginally longer opportunity for safe enjoyment of the stunning beaches. For detailed UV ratings throughout the year, check out Jaco UV Index.
UV Risk Categories
December in Jaco, Costa Rica, shines brightly with an impressive 311 hours of sunshine, making it one of the sunniest months of the year. As the rainy season wanes, this month welcomes visitors with a refreshing warmth and clear skies, setting the stage for stunning beach days and breathtaking sunsets. The trend throughout the year reveals a gradual increase in sunlight hours, peaking in March at 332 hours, before tapering off in the summer months. This seasonal shift accentuates December's allure, as its generous sunlight signifies the beginning of the dry season, perfect for outdoor adventures. Overall, Jaco's December allows sun-seekers to bask in the beautiful climate, offering the ideal backdrop for holiday getaways or relaxing retreats.
In December, Jaco, Costa Rica, enjoys a 52% chance of sunny weather, making it a delightful choice for sun-seekers as the year draws to a close. This figure reflects a moderate decrease from the more sunlit months of January through March, which boast chances ranging from 54% to 58%. As the wet season wanes, visitors can expect more favorable weather conditions that set the stage for outdoor adventures. Although the likelihood of sunshine dips in April and further through the rainy season, December's sun-soaked potential suggests a pleasant atmosphere for holiday getaways, while the 32% chance of sunny days in November hints at the transition towards drier, sunnier skies, laying the groundwork for festive December activities.
In Jaco, Costa Rica, December marks the conclusion of a year characterized by relatively stable daylight hours. As we transition from November's 11 hours of daylight, December retains that same 11-hour duration, hinting at a comfortable consistency during the start of the dry season. The months leading up to December witness a gradual increase in sunlight, peaking with 12 hours of daylight from March through September, which fosters vibrant scenery and lively activities. With daylight slowly waning towards the year’s end, the rhythm of nature in Jaco invites both locals and visitors to embrace the beautiful sunsets that punctuate this time of year. The predictable daylight pattern ensures that every day offers ample opportunity to explore the stunning beaches and lush landscapes, making Jaco a delightful destination year-round.
In December, Jaco, Costa Rica experiences a gentle breeze with an average wind speed of 2.3 m/s (5 mph), which marks a subtle dip as the year draws to a close. This is a slight decrease compared to the breezier months of August, which boasts winds of 3.2 m/s (7 mph), and it reflects a transition into a quieter seasonal rhythm. Throughout the year, wind speeds typically hover around 2.6 to 2.8 m/s (6 mph), with December being the calmest month. As the holiday season unfolds, visitors can enjoy the tranquil coastal atmosphere, perfect for relaxing beach days or serene sunset strolls, while the predictable winds create ideal conditions for water sports enthusiasts.
Weather in Jaco varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Jaco, focusing on differences in temperature, rainfall, humidity, and UV levels.
In December, the weather features temperatures ranging from a minimum of 24°C (76°F) to a maximum of 29°C (84°F), with an average of 27°C (80°F). The month experiences considerable rainfall, totaling 125 mm (4.9 in) over about 16 days, and a humidity level of 72%. In contrast, January sees a slight increase in the minimum temperature to 25°C (77°F), while the overall range remains similar, with a maximum of 29°C (85°F) and an average of 27°C (81°F). January is notably drier, with only 36 mm (1.4 in) of precipitation occurring over 7 days and a reduced humidity of 68%. For more detailed information, visit Jaco weather in January.
In December, the weather is characterized by slightly cooler temperatures, with a minimum of 24°C (76°F) and an average of 27°C (80°F), while February sees a marginally warmer minimum of 25°C (77°F) and the same average of 27°C (81°F). Precipitation in December is significantly higher, with 125 mm (4.9 in) falling over 16 days, compared to a mere 12 mm (0.5 in) over just 3 days in February. Additionally, December's humidity levels are a bit elevated at 72%, while February enjoys slightly drier conditions with 68% humidity. For more details on the weather during this month, visit Jaco weather in February.
December and March present distinct differences in weather conditions. In December, the climate is characterized by slightly lower temperatures, with minimums around 24°C (76°F) and average highs of 29°C (84°F). However, this month sees higher rainfall, averaging 125 mm (4.9 in) over 16 days, resulting in a humidity level of 72%. In contrast, March experiences warmer temperatures with a minimum of 25°C (77°F) and similar maximums, yet it is considerably drier, with only 13 mm (0.5 in) of precipitation over just 3 days and a lower humidity of 66%. For more details, check out Jaco weather in March.
In comparing the weather of December and April, we see that both months maintain relatively consistent average temperatures, with December experiencing minimums of 24°C (76°F) and April slightly warmer at 25°C (77°F). The maximum temperatures also remain close, peaking at 29°C (84°F) in December and 29°C (85°F) in April. However, April tends to be slightly wetter, with 130 mm (5.1 in) of precipitation over 21 days compared to December's 125 mm (4.9 in) over 16 days. Additionally, April has lower humidity at 67%, making it feel a bit less muggy than the 72% humidity typical of December. For a more detailed look into April weather conditions, you can visit Jaco weather in April.
In December, the weather typically features warm temperatures ranging from a minimum of 24°C (76°F) to a maximum of 29°C (84°F), with an average of 27°C (80°F). Despite the pleasant warmth, December experiences significant rainfall, totaling about 125 mm (4.9 in) across 16 days, accompanied by a humidity level of 72%. In contrast, May maintains similar temperature ranges, with a minimum of 25°C (77°F), an average of 27°C (81°F), and a maximum of 29°C (84°F). However, May is much wetter, receiving approximately 474 mm (18.7 in) of rain over 30 days while boasting slightly lower humidity at 69%. For a more detailed look at the weather in May, you can visit Jaco weather in May.
When comparing the weather in December and June, both months maintain a similar average temperature of 27°C (80°F), with daytime highs reaching up to 29°C (84°F). However, December features slightly cooler minimum temperatures at 24°C (76°F) compared to June's 25°C (77°F). A significant difference lies in the precipitation, as December experiences 125 mm (4.9 in) of rainfall over 16 days, while June sees a much wetter climate with 393 mm (15.5 in) over 29 days, contributing to higher humidity levels of 84% in June versus 72% in December. For more detailed information, you can check out Jaco weather in June.
In December, the weather in Jaco features warm temperatures with a minimum of 24°C (76°F) and an average of 27°C (80°F), peaking at a maximum of 29°C (84°F). This month sees around 125 mm (4.9 in) of precipitation over approximately 16 days, with humidity levels at a comfortable 72%. In contrast, July experiences slightly higher minimum temperatures, starting at 25°C (77°F), with the same average and maximum temperatures as December. However, July is considerably wetter, receiving 358 mm (14.1 in) of precipitation over 30 days, accompanied by higher humidity at 85%. For more detailed information, you can check out Jaco weather in July.
In December, the weather features a minimum temperature of 24°C (76°F) and an average of 27°C (80°F), with a maximum reaching 29°C (84°F). The month sees about 125 mm (4.9 in) of precipitation spread over 16 days, resulting in a humidity level of 72%. In contrast, August experiences slightly warmer temperatures, with a minimum of 25°C (77°F), the same average of 27°C (80°F), and a maximum of 28°C (83°F). However, it is significantly wetter, with 495 mm (19.5 in) of rainfall over 30 days, leading to higher humidity at 82%. For more detailed information about Jaco's weather in August, check out Jaco weather in August.
In comparing the weather of December and September, we observe a few notable differences. December features slightly warmer temperatures, with a minimum of 24°C (76°F) compared to September's 25°C (77°F), and an average of 27°C (80°F) against September's 26°C (80°F). However, September experiences significantly higher precipitation, with 461 mm (18.2 in) over 29 days, compared to December's 125 mm (4.9 in) over 16 days. Additionally, September's humidity level is higher at 81%, while December's humidity sits at 72%. For more details, check out Jaco weather in September.
In comparing the weather between December and October, December generally experiences slightly lower temperatures, with average daily highs reaching 29°C (84°F) compared to October's highs of 28°C (82°F). However, October faces significantly higher precipitation, totaling 638 mm (25.1 inches) over 30 days, while December sees a more manageable 125 mm (4.9 inches) across just 16 days. Additionally, humidity levels remain relatively high in both months, with October averaging around 80% compared to December's 72%. For those interested in the specific conditions of October, more details can be found at Jaco weather in October.
In comparing the weather of December and November, December experiences slightly warmer temperatures, with averages reaching 27°C (80°F) compared to November's 26°C (79°F). However, November sees more rainfall, recording a significant 303 mm (11.9 in) over 26 days, while December has only 125 mm (4.9 in) spread across 16 days. Additionally, humidity levels are higher in November at 80%, compared to 72% in December. For a detailed overview of November weather specifically in Jaco, you can check Jaco weather in November.
In December, Jaco experiences a noticeable shift in weather as the region transitions into the wet season, characterized by higher humidity levels and increased precipitation compared to the previous months. While temperatures remain comfortably warm, often peaking around 29°C (84°F) during the day, the frequent rain showers can lead to a more humid ambiance, creating a lush, vibrant atmosphere. This contrast from the drier months makes December a unique time to visit, perfect for those who want to experience the transformation of Jaco's natural beauty. For a comprehensive understanding of the climate throughout the year, check out Jaco Climate.