Last updated: August 21, 2025
December in Heredia, Costa Rica showcases a delightful climate characterized by pleasant temperatures and a vibrant atmosphere. With maximum temperatures reaching 24°C (75°F) and an average of 18°C (64°F), this month offers a comfortable environment for exploration. However, the minimum temperature can dip to 12°C (55°F), adding a cool touch to the evenings. Rainfall is notable, with a total of 156 mm (6.1 in) over 16 rainy days, contributing to the lush landscapes that define this region. Humidity remains relatively high at 72%, enhancing the tropical feel. Whether you’re wandering through the colorful streets or enjoying the rich biodiversity, December in Heredia promises a refreshing escape into nature.
In December, Heredia, Costa Rica, experiences a gentle transition into the dry season, with temperatures showcasing a pleasant range that highlights the region's mild climate. The minimum temperature dips slightly to 12°C (55°F), bringing a refreshing coolness, while the average temperature settles comfortably at 18°C (64°F). As the month progresses, daytime warmth peaks at a maximum of 24°C (75°F), creating a delightful atmosphere for outdoor activities. This gradual cooling trend from the warm peaks of November perfectly encapsulates December’s charm, making it an ideal time for both locals and visitors to enjoy the lush landscapes and vibrant culture of Heredia.
December marks a transition in Heredia, Costa Rica, as the rainfall begins to recede from the peak levels experienced during the rainy season. With 156 mm (6.1 in) of precipitation over 16 days, December offers a more moderate environment compared to the drenching downpours of previous months like October, which receives an impressive 517 mm (20.4 in). As the community gears up for the festive season, the trend shows a shift from the daily deluges characteristic of previous months, providing a respite that allows residents to enjoy the lush landscapes without the constant interruption of rain. This gradual decline in rainfall foreshadows the approaching dry season, making December a relatively tranquil month for both locals and visitors in this vibrant region.
In December, Heredia, Costa Rica, experiences a humidity level of 72%, marking a slight decline from the higher levels seen in the preceding months. As the rainy season transitions into the drier months, humidity begins to recede from its peak in June and July, where it soared to 84% and 85% respectively. This gradual decrease reflects the natural ebb and flow of the region's climate, with December offering a more comfortable atmosphere compared to the steamy highs of mid-year. Overall, while humidity remains relatively high throughout the year, this slight dip in December offers a refreshing respite as the year draws to a close, allowing both locals and visitors to enjoy the lush surroundings in a slightly drier yet still vibrant setting.
In Heredia, Costa Rica, the UV Index remains remarkably high throughout the year, with December featuring a notable UV Index of 11, classified as extreme and resulting in a burn time of just 10 minutes. This trend of consistently intense UV levels is evident from January to March, where values peak at 16 in April. Although December marks a slight dip from the peak months, the exposure remains serious, underscoring the importance of sun protection year-round. It's crucial for residents and visitors alike to stay vigilant against sun exposure, as the extreme category demands caution. For more detailed insights, visit the Heredia UV Index.
UV Risk Categories
December in Heredia, Costa Rica, offers a delightful transition into the new year with 289 hours of sunshine, making it a prime time for outdoor adventures and festive activities. As we compare month to month, March shines the brightest with an impressive 329 hours, showcasing the peak of the dry season. Notably, sunlight begins to wane slightly as the year progresses, with July registering the least at 229 hours. However, the first month of the holiday season stands out with a strong performance, reinforcing a favorable trend of abundant sunshine that begins in late fall and continues into winter. This pattern makes December not only a time for celebration but also an opportunity to soak in the radiant beauty of Heredia's landscapes under a warm sun.
In Heredia, Costa Rica, December offers a moderate 43% chance of sunny weather, making it a promising month for those seeking a glimpse of the sun. As the region transitions from the wetter months, the likelihood of clear skies shows a slight uptick compared to November's 22%. If we take a broader view, the trend reveals a gradual decline in sunshine from the beginning of the year, peaking in January at 47%. This decline continues through the dry season into April, where the chances drop dramatically to 16%. However, as the year draws to a close, December's weather begins to hint at a return of sunnier days, presenting an inviting opportunity for visitors and locals alike to enjoy the beautiful landscapes of Heredia.
In Heredia, Costa Rica, December ushers in a return to shorter days, with a daylight duration of 11 hours. This pattern is consistent with the months of January and February, which also enjoy the same amount of sunshine. From March to September, the daylight extends to a generous 12 hours, creating a vibrant atmosphere that encourages outdoor activities and exploration. As the year winds down, daylight shifts back to 11 hours in October and November, indicating a natural ebb and flow in light that mirrors the region's seasonal rhythms. This consistency in daylight duration throughout the year enhances the unique charm of Heredia, making it a year-round destination for sun-seekers and nature enthusiasts alike.
As December arrives in Heredia, Costa Rica, a gentle breeze heralds the holiday season with an average wind speed of 2.2 m/s (5 mph). This slight uptick from the calmer months of October and November, paired with the natural rhythms of the region, evokes a sense of transition. Notably, December's winds are reminiscent of the earlier months, particularly January and March, when similar speeds were recorded, suggesting a comforting return to more lively air after the stillness of mid-year. The winds invigorate the lush landscapes, hinting at the vibrancy of the season—an ideal backdrop for festive celebrations and outdoor activities amidst the tropical charm.
Weather in Heredia varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Heredia, focusing on differences in temperature, rainfall, humidity, and UV levels.
In December, the weather is characterized by slightly warmer temperatures, with a minimum of 12°C (55°F) and an average of 18°C (64°F), peaking at a maximum of 24°C (75°F). This month sees significant rainfall, with 156 mm (6.1 in) of precipitation spread over 16 days, resulting in a humidity level of 72%. In contrast, January experiences slightly cooler temperatures, starting at a minimum of 11°C (53°F) and averaging 17°C (63°F), while still reaching a maximum of 24°C (76°F). Rainfall decreases to 93 mm (3.7 in) across 11 days, contributing to a reduced humidity level of 68%. For more details on January weather, you can check Heredia weather in January.
In December, the weather is characterized by slightly warmer temperatures, with average highs reaching up to 24°C (75°F) and relatively high humidity at 72%. The month experiences significant rainfall, totaling 156 mm (6.1 in) over about 16 days, making it one of the wetter months of the year. In contrast, February sees a slight decrease in both temperature and humidity, with average highs of 25°C (78°F) and an average low of 11°C (52°F). Precipitation drops drastically to 43 mm (1.7 in) over 12 days, providing a much drier environment. For more detailed information on February weather patterns, you can visit Heredia weather in February.
In December, temperatures range from a minimum of 12°C (55°F) to a maximum of 24°C (75°F), with an average of 18°C (64°F). This month experiences significant precipitation, averaging 156 mm (6.1 in) over 16 days and a humidity level of 72%. In contrast, March sees slightly cooler temperatures, with a minimum of 11°C (53°F) and a maximum of 25°C (76°F), while maintaining the same average of 18°C (64°F). The rainfall in March is considerably lower, with just 49 mm (1.9 in) over 14 days and a reduction in humidity to 66%. For more detailed information about the weather in March, you can visit Heredia weather in March.
In December, the weather features a minimum temperature of 12°C (55°F) and an average of 18°C (64°F), with a maximum of 24°C (75°F). It experiences higher precipitation levels, totaling 156 mm (6.1 in) over 16 days, along with a humidity rate of 72%. In contrast, April sees slightly warmer temperatures with a minimum of 13°C (56°F), an average of 19°C (66°F), and a maximum of 26°C (80°F). Though it has lower total precipitation at 113 mm (4.4 in), April experiences rainfall on more days, totaling 23. The humidity is also a bit lower at 67%. For more detailed insights into April weather, check out Heredia weather in April.
In December, the weather is relatively mild, with temperatures ranging from a minimum of 12°C (55°F) to a maximum of 24°C (75°F) and an average of 18°C (64°F). The month sees a notable amount of rain, totaling 156 mm (6.1 in) over approximately 16 days, contributing to a humidity level of 72%. In contrast, May experiences slightly warmer temperatures, with a minimum of 14°C (58°F) and a maximum of 26°C (79°F), averaging around 19°C (67°F). However, May is much wetter, with significant precipitation of 425 mm (16.7 in) over 29 days, and a humidity level of 69%. For more details on the weather during this month, visit Heredia weather in May.
In December, the weather features milder temperatures with a minimum of 12°C (55°F) and an average of 18°C (64°F), reaching a maximum of 24°C (75°F). The month experiences moderate rainfall, totaling 156 mm (6.1 in) over approximately 16 days, with humidity levels around 72%. In contrast, June sees slightly warmer temperatures, with a minimum of 15°C (59°F) and an average of 19°C (67°F), peaking at 26°C (78°F). However, June is significantly wetter, receiving 341 mm (13.4 in) of precipitation over 28 days, and humidity rises to 84%. For more details about the weather in June, you can visit Heredia weather in June.
In December, the weather features milder temperatures with a minimum of 12°C (55°F), an average of 18°C (64°F), and a maximum of 24°C (75°F), accompanied by a humidity level of 72%. However, this month sees considerable precipitation, with 156 mm (6.1 in) of rain over approximately 16 days. In contrast, July experiences a slightly warmer climate, with temperatures ranging from a minimum of 15°C (59°F) to a maximum of 25°C (77°F), but it is also significantly wetter, receiving 266 mm (10.5 in) of rain over 28 days and a higher humidity level of 85%. For a detailed look at weather conditions, you can visit Heredia weather in July.
In comparing December and August weather, December presents milder temperatures with a minimum of 12°C (55°F) and a maximum of 24°C (75°F), while August is slightly warmer, ranging from a minimum of 15°C (59°F) to a maximum of 26°C (79°F). However, August experiences significantly higher rainfall, with 304 mm (12.0 in) over 28 days compared to December's 156 mm (6.1 in) across 16 days. Additionally, humidity levels are slightly higher in August at 82%, compared to December's 72%. For a more detailed look at August weather in Heredia, visit Heredia weather in August.
In comparing the weather between December and September, December typically presents milder temperatures, with a minimum of 12°C (55°F) and an average of 18°C (64°F), peaking at 24°C (75°F). In contrast, September showcases slightly warmer temperatures, ranging from a minimum of 14°C (58°F) to a maximum of 25°C (78°F) and an average of 19°C (66°F). However, September is characterized by significantly higher precipitation, receiving a substantial 379 mm (14.9 in) over 29 days, compared to December's 156 mm (6.1 in) over 16 days. Additionally, humidity levels are higher in September at 81%, compared to December's 72%. For more detailed information about September's weather, you can visit Heredia weather in September.
When comparing the weather in December to October, December tends to be slightly warmer, with average temperatures ranging from 12°C (55°F) to 24°C (75°F), while October has a slightly higher range from 14°C (58°F) to 25°C (78°F). However, October experiences significantly more precipitation, with 517 mm (20.4 in) spread over 29 days, compared to December's 156 mm (6.1 in) over just 16 days. Additionally, October has a higher humidity level of 80%, compared to December's 72%. This makes October a wetter month overall, while December offers milder temperatures and less rain. For more specific insights, you can check Heredia weather in October.
In comparing the weather between December and November, we find some notable differences, particularly in precipitation and humidity levels. December experiences a slightly milder temperature range, with a minimum of 12°C and an average of 18°C, while November sees slightly cooler temperatures with a minimum of 14°C and an average of 18°C. However, November is significantly wetter, receiving 260 mm of rain over 24 days compared to December's 156 mm over 16 days. Additionally, humidity is higher in November at 80%, compared to December's 72%. For more detailed insights on November weather, you can refer to Heredia weather in November.
As December rolls in, Heredia experiences a shift in its climate that sets it apart from the drier months. The cooler temperatures offer a refreshing respite, with average highs around 24°C, while the increased humidity levels around 72% create a characteristic tropical feel. December is also marked by significant rainfall, with about 16 days of precipitation contributing to a total of 156 mm for the month. This is a stark contrast to the preceding months when the weather tends to be much drier and sunnier. Embrace the unique charm of December's wet season and explore more about the fascinating Heredia Climate.