Last updated: August 31, 2025
December in Carolina, Puerto Rico, offers a pleasant warm climate, with maximum temperatures reaching 31°C (87°F) and an average of 26°C (78°F). The season brings mild evenings, where minimum temperatures hover around 23°C (73°F). While the island enjoys lively weather, expect about 51 mm (2.0 in) of rainfall across 16 days, contributing to a humidity level of 76%. This combination creates a tropical feel, where visitors can experience both the warmth of the sun and the refreshing touch of occasional showers.
In December, Carolina, Puerto Rico enjoys a pleasant transition into winter, characterized by mild temperatures that make it an inviting destination. With minimums around 23°C (73°F) and average highs reaching 31°C (87°F), the weather remains comfortably warm, averaging 26°C (78°F) overall. This month marks a slight cooling trend compared to the peak summer months, yet the warmth still lingers, making December perfect for outdoor activities and beach outings. As you soak up the sun, you’ll find that the weather creates a delightful atmosphere for both relaxation and exploration, setting the stage for a memorable holiday season.
In December, Carolina, Puerto Rico experiences a notable shift in precipitation patterns, marking the close of the wet season. With an average rainfall of 51 mm (2.0 in) over 16 days, the month sees a significant decrease compared to the torrential rains of September, which recorded a staggering 173 mm (6.8 in). While October and November continue to showcase heavy rainfall, December's precipitation is a more moderate, albeit consistent, reminder of the island's tropical climate. This reduction sets the stage for drier months ahead, reminiscent of the drier conditions typical of January and February. The transition underscores the dynamic weather patterns that characterize Puerto Rico's climate, offering a balance between lush greenery and the onset of the cooler, drier winter months.
In Carolina, Puerto Rico, the humidity levels display a notable trend throughout the year. December wraps up the year with a humidity of 76%, slightly lower than the preceding months of November (78%) and October (78%), yet still consistent with the cooler, wetter conditions of late fall. As the calendar moves from the heat of the summer, where humidity peaks at 80% in both July and August, the numbers gradually taper off, hinting at a shift towards more comfortable climatic conditions as winter approaches. Overall, despite the fluctuations, the humidity remains relatively steady within the range of 74% to 80%, creating a humid yet inviting atmosphere that characterizes Carolina's tropical charm.
In December, Carolina, Puerto Rico experiences a UV Index of 8, categorized as very high, with a burn time of about 15 minutes. This slight decrease from the previous months reflects the consistent trend of extreme UV levels throughout the earlier part of the year, where indices ranged between 11 and 14 from February to May. As the year winds down, the UV Index gradually lowers, yet it remains a crucial reminder of the island’s intense sun exposure, especially post-holiday season. Visitors and residents alike should continue to practice sun safety to protect their skin, making it essential to stay informed through resources like Carolina UV Index.
UV Risk Categories
As December unfolds in Carolina, Puerto Rico, residents enjoy an average of 319 hours of sunshine, contributing to the region's reputation for vibrant winter warmth. This month shines consistently, with sunlight hours significantly above January's 257, yet below the peak of May, which boasts an impressive 356 hours. Interestingly, sunshine begins to taper slightly after the summer months, where July's 353 hours and August's 349 hours create a sun-drenched stretch in the middle of the year. December's sunlight serves as a gentle transition into winter, maintaining a cozy glow amidst the cooler temperatures. Overall, the trend reveals a rich seasonal variety, with each month offering its own unique charm, while December confidently upholds its sunny legacy.
As December rolls into Carolina, Puerto Rico, there's a notable 63% chance of enjoying sunny weather, making it one of the more favorable months for sun-seekers. This month follows November's solid 61% likelihood, suggesting a trend of gradually increasing sunshine as the year comes to a close. Interestingly, the sunniest months are typically seen in the early part of the year, peaking in February with a solid 70%. However, December maintains a consistent warmth, bridging the gap between the active sun months and the cooler, cloudier days that often characterize the region in late winter. With December's sun-filled potential, it's a perfect time to soak up the Island's vibrant culture and breathtaking landscapes.
In Carolina, Puerto Rico, December continues the trend of consistently shorter daylight hours, offering around 11 hours of sunlight—a duration mirrored in both January and February. As the year progresses into March, daylight begins to gradually increase, reaching 12 hours and peaking at 13 hours in the vibrant months of June and July. This seasonal shift not only brightens the summer days but also plays a significant role in the region's lush, tropical landscape. As the days shorten again from August through November, the return to 11 hours in December signifies a cycle of renewal, preparing the island for a gentle transition into the new year’s rhythm of light.
As December settles over Carolina, Puerto Rico, residents can enjoy a gentle breeze with an average wind speed of 4.4 m/s (10 mph). This marks a subtle but noteworthy increase from the steady 3.7 m/s (8 mph) in November, breathing a refreshing air into the holiday season. Interestingly, while the winds tend to pick up in the warmer months, with July reaching a peak of 5.3 m/s (12 mph), December's winds remind us that even in cooler times, there’s a soothing consistency present. Overall, December's breezes maintain a comfortable middle ground, providing a pleasant transition as the islands embrace cooler evenings while still holding onto the warmth of summer's lingering embrace.
Weather in Carolina varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Carolina, focusing on differences in temperature, rainfall, humidity, and UV levels.
December weather features slightly warmer temperatures, with average highs reaching up to 31°C (87°F), while January sees a slight drop in temperatures, peaking at 29°C (85°F). Both months experience high humidity levels at 76%, but December has more precipitation, totaling 51 mm (2.0 in) over 16 days, compared to January's 38 mm (1.5 in) over 12 days. This makes January relatively drier and a bit cooler, offering a slight respite from the warmer December climate. For more detailed weather insights, you can check out Carolina weather in January.
In December, the weather tends to be slightly warmer, with average temperatures around 26°C (78°F) and maximums reaching up to 31°C (87°F). This month also sees more precipitation, with 51 mm (2.0 in) falling over about 16 days, resulting in a humidity level of 76%. In contrast, February experiences marginally cooler temperatures, with an average of 25°C (77°F) and maximums peaking at 29°C (85°F). Precipitation decreases to 43 mm (1.7 in) over 12 days, leading to a slightly lower humidity of 75%. For more detailed information, you can check Carolina weather in February.
December and March weather exhibit some similarities but also notable differences. In December, temperatures range from a minimum of 23°C (73°F) to a maximum of 31°C (87°F), with an average temperature of 26°C (78°F). The month sees around 51 mm (2.0 in) of precipitation over 16 days, with humidity at 76%. In contrast, March tends to be slightly cooler, with temperatures ranging from a minimum of 21°C (71°F) to a maximum of 30°C (86°F), and an average of 25°C (77°F). Precipitation levels are higher at 67 mm (2.6 in) across 14 days, while humidity decreases slightly to 74%. For more detailed insights on March weather, you can check Carolina weather in March.
In December, the weather features minimum temperatures around 23°C (73°F) and averages around 26°C (78°F), with maximums reaching 31°C (87°F). This month sees approximately 51 mm (2.0 in) of precipitation over about 16 days, coupled with a humidity level of 76%. In contrast, April experiences similar temperature ranges, with minimums at 22°C (71°F), averages of 26°C (78°F), and maximums slightly higher at 31°C (88°F). However, April has a slightly higher precipitation level of 56 mm (2.2 in) over just 10 days, and humidity is slightly lower at 75%. For more details on the weather specifics in April, you can refer to this link: Carolina weather in April.
In December, the weather is warm with average temperatures ranging from a minimum of 23°C (73°F) to a maximum of 31°C (87°F), accompanied by 51 mm (2.0 in) of rainfall over 16 days and a humidity level of 76%. Conversely, May experiences slightly warmer conditions, with an average temperature of 27°C (80°F) and a maximum reaching 32°C (90°F). Precipitation in May is also more significant, totaling 64 mm (2.5 in) over 13 days, but the humidity remains comparable at 75%. For a more detailed look at the weather in May, visit Carolina weather in May.
December and June offer warm and humid weather, but June tends to be slightly warmer and wetter than December. In December, temperatures range from a minimum of 23°C (73°F) to a maximum of 31°C (87°F) with an average of 26°C (78°F), accompanied by 51 mm (2.0 in) of precipitation over 16 days at a humidity level of 76%. In contrast, June sees a minimum temperature of 24°C (75°F), rising to a maximum of 32°C (90°F) and an average of 27°C (81°F), along with increased precipitation of 68 mm (2.7 in) over 15 days and a humidity level of 77%. For a more detailed look at the weather conditions during June, visit Carolina weather in June.
December and July present distinct weather patterns in terms of temperature and precipitation. In December, temperatures range from a minimum of 23°C (73°F) to a maximum of 31°C (87°F), with an average of 26°C (78°F). This month experiences a total precipitation of 51 mm (2.0 in) spread over 16 days, along with a humidity level of 76%. In contrast, July is slightly warmer, with temperatures ranging from a minimum of 24°C (76°F) to a maximum of 32°C (90°F), and an average of 28°C (82°F). Rainfall is heavier in July, totaling 87 mm (3.4 in) across 18 days and featuring a slightly higher humidity of 80%. For a more detailed look at July weather, visit Carolina weather in July.
In December, the weather in Carolina features a minimum temperature of 23°C (73°F) and an average of 26°C (78°F), peaking at a maximum of 31°C (87°F). With 51 mm (2.0 in) of precipitation spread over 16 days, humidity levels hover around 76%. In contrast, August experiences slightly warmer temperatures, with a minimum of 24°C (76°F) and an average of 28°C (82°F), reaching up to 32°C (90°F) at its hottest. However, this month is wetter, with 99 mm (3.9 in) of rainfall over 18 days and humidity increasing to 80%. For more detailed insights, check out Carolina weather in August.
In comparing the weather between December and September, December tends to be slightly cooler, with average temperatures ranging from a minimum of 23°C (73°F) to a maximum of 31°C (87°F), while September features higher averages of 24°C (76°F) to 32°C (90°F). Additionally, December experiences less rainfall, with 51 mm (2.0 in) over 16 days compared to September's 173 mm (6.8 in) across 23 days. Humidity levels are also comparable, with December's 76% not far off from September's 79%. For more detailed information, you can check out Carolina weather in September.
When comparing the weather of December with October, we observe notable differences in temperature and precipitation patterns. December tends to be slightly cooler, with average temperatures ranging from a minimum of 23°C (73°F) to a maximum of 31°C (87°F), while October is warmer, with average temperatures between 24°C (75°F) and 32°C (89°F). Additionally, October experiences significantly higher precipitation, with 145 mm (5.7 in) falling over 22 days compared to December’s 51 mm (2.0 in) over 16 days. Humidity levels are relatively similar in both months, with October at 78% and December at 76%. For more detailed insights on the weather in October, you can visit Carolina weather in October.
Comparing the weather between December and November reveals some notable similarities and differences. Both months experience a minimum temperature of around 23°C (73°F) and a maximum of 31°C (87°F), with average temperatures hovering around 26°C (78°F). However, December sees a significant decrease in precipitation, with 51 mm (2.0 in) over 16 days compared to November's 106 mm (4.2 in) for the same number of rainy days. Humidity levels are also slightly lower in December at 76%, compared to November's 78%. For more detailed information, you can refer to Carolina weather in November.
As December unfolds in Carolina, the transition to cooler weather becomes evident, distinguishing it from the warmer months of the year. With average temperatures hovering around a pleasant 26°C (78°F), this month offers a refreshing break from the typical heat. Although rainfall increases slightly, bringing about 51 mm across 16 days, the humidity remains relatively high at 76%, infusing the air with a tropical feel. Compared to the hotter summer months, December's cooler temperatures and sporadic showers create an inviting atmosphere for outdoor activities. For those keen on understanding the intricate patterns of local weather, explore more at Carolina Climate.