Last updated: August 21, 2025
In December, Cariari, Costa Rica experiences a tropical climate characterized by warm temperatures and significant rainfall. The maximum temperature reaches around 29°C (84°F), while the average hovers at a comfortable 23°C (73°F), making it an inviting destination for travelers. However, nights can be cooler, with temperatures dipping to a minimum of 17°C (64°F). This month sees a substantial precipitation amount of 320 mm (12.6 in), spread across approximately 20 days, contributing to the region's lush greenery. Additionally, the humidity levels remain high at 74%, accentuating the vibrant, tropical atmosphere of Cariari during this time of year.
In December, Cariari, Costa Rica, wraps up the year with pleasantly mild temperatures. The minimums hover around 17°C (64°F), providing a comfortable start to the day, while the averages settle at 23°C (73°F), striking a delightful balance between warmth and coolness. As the sun climbs higher, maximums reach around 29°C (84°F), offering a lovely backdrop for outdoor adventures. Notably, December represents a slight drop in temperatures compared to the preceding months, hinting at the transition into the cooler dry season. This month beautifully embodies the region's tropical charm, making it an ideal time for visitors to explore Cariari's lush landscapes and vibrant culture.
In December, Cariari, Costa Rica experiences a notable shift in precipitation patterns, receiving 320 mm (12.6 in) of rainfall over 20 days. This marks a decrease compared to the prior month, November, which brought in 334 mm (13.1 in) over 26 days. As the year draws to a close, the rainfall in December signals a transition, echoing the tapering off of the rainy season while still contributing significantly to the region's lush landscapes. Notably, December’s precipitation is almost on par with the previous December average of 203 mm (8.0 in), highlighting a wetter end to the year. Such trends indicate a persistent, yet slightly reduced, wet season, preserving the vibrant ecological tapestry that characterizes this stunning destination.
In December, Cariari, Costa Rica, experiences a humidity level of 74%, a modest decrease from the high humidity levels of the preceding months. The year begins with humidity levels around 71% in January and reduces gradually until March, when it reaches its lowest point at 68%. As the year progresses into the rainy season, humidity spikes dramatically in June, peaking at an impressive 81% in October. After a brief climb through the summer months, December sees a slight dip, indicating a transitional phase as the region settles into the drier months of the year. Overall, the pattern highlights a humid tropical climate, characterized by fluctuating levels influenced by seasonal shifts.
In December, Cariari, Costa Rica experiences a slight dip in its UV Index, registering at 10 on the scale, which falls into the very high exposure category. This marks a transition from the extreme UV levels that dominate the earlier months of the year, where indexes peak at 14 from March through May. While December offers a brief respite with a burn time of 15 minutes, caution is still advised as the sun’s rays can be quite strong. Overall, the trend showcases a consistent pattern of high UV exposure throughout the year, emphasizing the need for sun safety year-round. For more detailed information, visit Cariari UV Index.
UV Risk Categories
December in Cariari, Costa Rica, offers a delightful blend of sun-soaked days, averaging 275 hours of bright sunshine. As the year draws to a close, the sunshine hours reflect a pleasing consistency, just slightly below the vibrant 326 hours of March, the sunniest month. The trend showcases a gradual decline from the peak of late winter, but December still provides plenty of radiant warmth as it maintains higher sunlight levels than the summer months of July and August. Visitors can bask in the golden glow as they embrace the lush landscapes and festive spirit, making December a perfect time to enjoy the beauty of Costa Rica.
In December, the likelihood of sunny weather in Cariari, Costa Rica, offers a promising 44% chance of sunshine, making it a delightful month for outdoor activities. This is a notable increase compared to the following months, such as April and May, where sunny days plummet to just 21% and 17%, respectively. Additionally, December's sunniest outlook comes shortly after a dip in sunshine throughout the rainy season, with the lowest chances occurring from August to October. Consequently, December emerges as a desirable time for visitors seeking pleasant weather, suggesting a positive trend towards brighter days as the year comes to a close.
In Cariari, Costa Rica, the daylight duration exhibits a gentle rhythm throughout the year. From January to February, the sun graces the region with 11 hours of light each day, creating a consistent start to the year. As spring approaches in March, daylight stretches to 12 hours, continuing through the lush months of April, May, June, July, and August. This ample sunlight fosters vibrant landscapes, ideal for outdoor adventures. Interestingly, as autumn arrives in September, daylight remains steady at 12 hours, only to taper back to 11 hours again by October. This trend continues through November, leading to a consistent 11-hour daylight pattern in December, marking the end of the year with a predictable yet beautiful transition from longer to shorter days.
As December unfolds in Cariari, Costa Rica, the winds begin to whisper a gentle farewell to the dry season, with an average wind speed of 1.4 m/s (3 mph). This slight increase from the previous month reflects a subtle transition, influenced by the approach of the rainy season. Throughout the year, wind speeds have gradually fluctuated, with the highest being 1.7 m/s (4 mph) in March, while the lowest of 1.1 m/s (2 mph) has been seen during the rainy months of June to October. December’s breezes carry a unique charm, hinting at the refreshing rains to come while maintaining an inviting warmth — a perfect prelude to Costa Rica's vibrant, lush landscapes of the wet season ahead.
Weather in Cariari varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Cariari, focusing on differences in temperature, rainfall, humidity, and UV levels.
In December, the weather is generally warmer with temperatures ranging from a minimum of 17°C (64°F) to a maximum of 29°C (84°F), and an average temperature of 23°C (73°F). However, it also sees significant precipitation of 320 mm (12.6 in) over 20 days, contributing to higher humidity levels at 74%. In contrast, January experiences slightly cooler temperatures, with a minimum of 16°C (62°F), an average of 22°C (72°F), and a maximum of 28°C (82°F). Precipitation decreases to 203 mm (8.0 in) across 14 days, and humidity is marginally lower at 71%. For more details, check out Cariari weather in January.
December and February in Cariari offer distinct weather experiences. In December, temperatures range from a minimum of 17°C (64°F) to a maximum of 29°C (84°F), with an average of 23°C (73°F). The month is notably wetter, receiving 320 mm (12.6 in) of rain over 20 days, resulting in a humidity level of 74%. In contrast, February sees slightly cooler temperatures, with lows of 15°C (60°F) and highs reaching 30°C (86°F), while averaging 22°C (72°F). This month experiences significantly less rainfall at 86 mm (3.4 in) over 13 days, leading to a lower humidity level of 70%. For more details, check out Cariari weather in February.
December and March showcase distinct weather patterns, though both maintain similar average temperatures around 23°C (73°F). In December, temperatures range from a minimum of 17°C (64°F) to a maximum of 29°C (84°F), accompanied by significant rainfall totaling 320 mm (12.6 in) over 20 days and a humidity level of 74%. In contrast, March tends to be drier, with lower precipitation at 93 mm (3.7 in) over 15 days, and slightly warmer maximum temperatures reaching up to 30°C (86°F). The humidity in March also drops slightly to 68%, contributing to a more comfortable atmosphere. For more detailed insights on the conditions during this month, check out Cariari weather in March.
In December, the weather is characterized by a warmer and more humid climate, with average temperatures ranging from a minimum of 17°C (64°F) to a maximum of 29°C (84°F) and a considerable amount of rainfall at 320 mm (12.6 in) over 20 days. In contrast, April experiences slightly higher average temperatures, peaking at 31°C (88°F), but with significantly less precipitation at 120 mm (4.7 in) during 23 days, leading to a drier atmosphere with lower humidity at 69%. For a detailed look at weather conditions in April, you can visit Cariari weather in April.
December and May present distinct weather patterns, highlighting the seasonal transitions. In December, temperatures range from a minimum of 17°C (64°F) to a maximum of 29°C (84°F), with an average of 23°C (73°F). The month experiences considerable rainfall, totaling 320 mm (12.6 in) over approximately 20 days, accompanied by higher humidity levels of 74%. In contrast, May sees slightly warmer temperatures, with a minimum of 19°C (66°F) and a maximum of 32°C (91°F), averaging 24°C (76°F). Rainfall increases to 356 mm (14.0 in) across 28 days, while humidity remains lower at 70%. For those interested in exploring the specifics of May's climate, detailed information can be found at Cariari weather in May.
In December, the weather is characterized by a pleasant range of temperatures, with minimums around 17°C (64°F), averaging 23°C (73°F), and peaking at 29°C (84°F). However, this month also brings considerable rainfall, with 320 mm (12.6 in) spread over 20 days and a humidity level of 74%. In contrast, June experiences slightly higher temperatures, with minimums at 20°C (68°F), an average of 24°C (76°F), and maximums reaching 32°C (89°F). Despite having lower total precipitation at 269 mm (10.6 in), June sees rain on more days, totaling 28, along with higher humidity at 81%. For a closer look at the June climate, visit Cariari weather in June.
When comparing the weather in December and July, we find that December tends to be slightly cooler, with average temperatures ranging from a minimum of 17°C (64°F) to a maximum of 29°C (84°F), while July has higher temperatures, averaging from 19°C (67°F) to 31°C (87°F). December experiences more frequent rainfall, with 320 mm (12.6 in) over 20 days, compared to July's 286 mm (11.3 in) spread over 28 days. Additionally, the humidity is noticeably higher in July at 88%, compared to December's 74%. For more detailed information on July weather conditions, check out Cariari weather in July.
When comparing the weather between December and August, several differences emerge. December generally features a milder temperature range, with minimums around 17°C (64°F) and maximums reaching 29°C (84°F), resulting in an average of 23°C (73°F). However, it also experiences significant rainfall, accumulating 320 mm (12.6 in) over approximately 20 days, accompanied by a humidity level of 74%. In contrast, August tends to be warmer, with minimum temperatures of 20°C (68°F) and maximums peaking at 32°C (89°F), leading to an average of 24°C (76°F). Rainfall is less intense in August, totaling 203 mm (8.0 in), but it is distributed across 28 days, increasing the overall humidity to 85%. For those looking for a more detailed look at August conditions, check out Cariari weather in August.
In comparing the weather of December and September, we can observe notable differences. December typically experiences slightly warmer temperatures, with an average low of 17°C (64°F) and an average high of 29°C (84°F), compared to September's range of 19°C (66°F) to 31°C (89°F). However, September is characterized by higher humidity at 84%, while December has a somewhat lower humidity level of 74%. Additionally, December sees significantly more precipitation, with 320 mm (12.6 in) spread over 20 days, compared to September's 192 mm (7.6 in) over 27 days. For a more detailed perspective, you can check out Cariari weather in September.
In comparing the weather between December and October, we see notable differences in both temperature and precipitation. December tends to be slightly cooler, with average temperatures ranging from a minimum of 17°C (64°F) to a maximum of 29°C (84°F), while October offers warmer conditions, with temperatures peaking at 31°C (89°F) and a minimum of 19°C (66°F). Precipitation levels are higher in October, at 405 mm (15.9 in) over 29 days, compared to December's 320 mm (12.6 in) across 20 days. Additionally, October has a higher humidity of 82% compared to December's 74%, making the former feel more oppressive. For a detailed look at the weather specifics in October, you can refer to Cariari weather in October.
In comparing the weather between November and December, both months exhibit similar average temperatures, with December having a slightly lower minimum temperature of 17°C (64°F) compared to November's 19°C (66°F). November tends to be a bit warmer overall, boasting a maximum temperature of 30°C (86°F) against December's 29°C (84°F). However, December experiences slightly less precipitation at 320 mm (12.6 in) over 20 days, compared to November's 334 mm (13.1 in) over 26 days. Additionally, humidity levels are higher in November at 81%, versus December's 74%. For more detailed information about the climate during this time, check Cariari weather in November.
As December arrives in Cariari, the weather shifts to a more refreshing ambiance, showcasing a delightful blend of warm temperatures and increased humidity. Although the month features warmer maximums compared to earlier months, the average and minimum temperatures create a comfortable atmosphere ideal for outdoor exploration. However, the hallmark of December is its notable rainfall, with precipitation occurring on nearly two-thirds of the month, enriching the lush greenery that defines this region. This contrast in weather not only adds vibrancy to the landscape but also marks the transition towards the wet season. For a deeper understanding of Cariari's weather patterns, visit Cariari Climate.