Last updated: August 31, 2025
December in Monserrate, Puerto Rico, offers a blend of tropical warmth and occasional rain, making it a captivating month for visitors. With maximum temperatures reaching up to 31°C (87°F) and averaging around 26°C (78°F), the weather remains pleasantly warm. However, expect the serene scenery to be occasionally punctuated by rainfall, as the month sees about 50 mm (2.0 in) of precipitation spread over 16 days. Humidity levels hover around 76%, contributing to the lush, vibrant landscapes that define this enchanting locale. Whether you're lounging on the beach or exploring the lush terrain, December in Monserrate promises a delightful tropical experience.
In December, Monserrate, Puerto Rico experiences a delightful transition as temperatures begin to cool slightly from the warmer months. With minimum temperatures around 22°C (73°F) and averaging 26°C (78°F), visitors can expect comfortable conditions for exploring the region. The maximum temperature reaches 31°C (87°F), making it a perfect time to enjoy both outdoor activities and festive local events. Compared to the previous months, December’s temperatures signal a gentle shift, offering a balance of warmth and a hint of crispness in the air, ensuring a pleasantly inviting atmosphere for holiday gatherings and island adventures.
In December, Monserrate, Puerto Rico, experiences a relatively moderate precipitation pattern, collecting about 50 mm (2.0 in) of rain over the month, a notable decrease compared to the earlier months of the year. With rain falling on approximately 16 days, December maintains a balanced, yet somewhat subdued, wetness as the year draws to a close. This shift follows the peak wetness of September, which recorded a remarkable 172 mm (6.8 in) of rainfall, illustrating a clear trend of diminishing precipitation leading into winter. The transition from the heavy rains of late summer and early fall to the milder, more sporadic showers of December highlights the region's changing climate dynamics and hints at the gradual approach of drier conditions in the upcoming months.
In Monserrate, Puerto Rico, December's humidity levels hover around a comfortable 76%, maintaining a consistent trend observed over the preceding months. As the year unfolds, humidity peaks in the warm summer months of July and August at 80%, signaling a typical tropical climate. However, as the calendar shifts toward the end of the year, humidity gradually recedes, mirroring the slight decline seen from March onward, which started at 74%. This steady progression showcases a balance of moisture throughout the seasons, making Monserrate's December both refreshing and pleasantly humid, perfect for those seeking to escape the colder northern climates.
In December, Monserrate, Puerto Rico experiences a UV Index of 8, categorizing it as very high with a recommended burn time of just 15 minutes. This marks a slight decline from the previous month’s UV Index of 9, but the risk remains significant. Throughout the year, Monserrate consistently faces extreme UV levels from February through October, peaking at 14 in May. Notably, while January and November also present very high levels, December signals the gradual decline of extreme exposure. It's essential for both residents and visitors to stay vigilant and protect their skin, particularly during the brighter months. For more detailed information on UV trends, visit Monserrate UV Index.
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As December arrives in Monserrate, Puerto Rico, the island basks in a delightful 319 hours of sunshine, marking a charming close to the year. This month's daylight tally reflects the thriving trend of bright weather that has steadily built through the summer months, peaking in May with an impressive 356 hours. Despite a slight dip in November, December's sunshine remains abundant, highlighting the region's consistency in offering sun-soaked days. With a relatively stable average throughout the year, where hours hover between 296 to 356 hours, it’s clear that Monserrate is a haven for those seeking warm, illuminating escapes as the year draws to a close. Whether you're lounging on the beach or exploring the lush landscapes, the December sun promises to wrap visitors in its golden embrace.
In Monserrate, Puerto Rico, December brings a promising 64% chance of sunny weather, making it one of the brighter months of the year. This trend is a delightful lead-in to the sunny expanses of February, which boasts a remarkable 71% probability of sunshine, hinting at the island's gradually improving climate as it transitions from the rainy season. While June and July see a dip in sunny days, December sits comfortably above the monthly average, providing a lovely winter escape for those seeking warmth and brightness. As autumn gives way to winter, the combination of pleasant temperatures and a good likelihood of clear skies makes December an ideal time to enjoy the vibrant beauty of Puerto Rico.
In Monserrate, Puerto Rico, the daylight hours exhibit a gentle rhythm throughout the year. In December, like in January and February, residents enjoy 11 hours of daylight, keeping the winter months consistent. This steady duration contrasts with the longer days of mid-year, where June and July bask in 13 hours of sunlight, marking the peak of summer. As the seasons transition, daylight gradually declines in the fall, returning to 11 hours in both October and November. Notably, the spring months of March, April, and May introduce a brief rise to 12 hours, hinting at the vibrant energy of approaching summer. Overall, the daylight patterns in Monserrate create a warm and inviting environment, encouraging outdoor activities year-round.
In Monserrate, Puerto Rico, December brings an average wind speed of 4.4 m/s (10 mph), marking a slight uptick from the calmer breezes of November. As the year draws to a close, the winds exhibit a gentle rhythm, reminiscent of the drier months earlier in the year. Observing the trend, it's notable that the highest winds peak during the summer months, particularly in July, while the months of September and October usher in a noticeable dip. By December, winds are moderate, creating an inviting atmosphere for outdoor activities and scenic explorations. This seasonal wind pattern perfectly complements the island's vibrant winter charm, offering both comfort and a refreshing touch to the island's warm temperatures.
Weather in Monserrate varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Monserrate, focusing on differences in temperature, rainfall, humidity, and UV levels.
In comparing the weather between December and January, both months exhibit warm temperatures typical of a tropical climate. December has a minimum temperature of 22°C (73°F) and averages around 26°C (78°F), with maximums reaching 31°C (87°F). In contrast, January sees slightly cooler temperatures, with a minimum of 20°C (69°F) and an average of 25°C (77°F), peaking at 30°C (86°F). Precipitation levels are also reduced in January, with 39 mm (1.5 in) over 12 days, compared to December's 50 mm (2.0 in) across 16 days. Despite these differences, humidity remains steady at 76% for both months. For more detailed weather insights, you can check Monserrate weather in January.
December and February showcase similar warm weather, but there are subtle differences worth noting. In December, temperatures range from a minimum of 22°C (73°F) to a maximum of 31°C (87°F), with an average of 26°C (78°F). This month experiences a higher precipitation level of 50 mm (2.0 in) over 16 days and maintains a humidity level of 76%. In contrast, February exhibits slightly cooler temperatures, with a minimum of 21°C (70°F), an average of 25°C (77°F), and a maximum of 30°C (85°F). Precipitation decreases to 43 mm (1.7 in) over 13 days, and humidity remains relatively stable at 75%. For more detailed insights into the weather in February, visit Monserrate weather in February.
When comparing the weather in December and March, both months showcase warm temperatures, with December having slightly higher averages. In December, temperatures range from a minimum of 22°C (73°F) to a maximum of 31°C (87°F), while March sees a minimum of 21°C (70°F) and maintains a max of 31°C (87°F) as well. December experiences approximately 50 mm (2.0 in) of precipitation over 16 days, compared to March's 72 mm (2.8 in) across 14 days, indicating a wetter March. Humidity levels are similar, with December at 76% and March slightly lower at 74%. For more details on March weather specifics, you can visit Monserrate weather in March.
In comparing the weather of December and April, both months showcase similar temperature ranges, with minimums at 22°C (73°F), averages of 26°C (78°F), and maximums reaching 31°C (87°F for December and 88°F for April). However, December experiences slightly less precipitation, totaling 50 mm (2.0 in) over 16 days, compared to April’s 55 mm (2.2 in) spread across just 10 days. Additionally, humidity levels are marginally lower in April at 75%, compared to 76% in December. For more specific details on April weather conditions, you can visit Monserrate weather in April.
When comparing December and May weather, both months exhibit warm temperatures, although May tends to be slightly warmer. December features a minimum temperature of 22°C (73°F) and an average of 26°C (78°F), reaching a maximum of 31°C (87°F), with an average humidity of 76%. In contrast, May's temperatures start at a minimum of 23°C (73°F) and peak slightly higher, with an average of 27°C (80°F) and a maximum of 32°C (90°F). Rainfall is also a factor, as December receives about 50 mm (2.0 in) of precipitation over 16 days, while May records a bit more, at 58 mm (2.3 in) over 14 days. Despite the increased rain in May, the humidity remains quite similar at 75%. For more detailed insights, you can check Monserrate weather in May.
In December, temperatures in Monserrate range from a minimum of 22°C (73°F) to a maximum of 31°C (87°F), averaging around 26°C (78°F). The month experiences 50 mm (2.0 in) of rainfall spread over 16 days, with humidity levels at 76%. In comparison, June sees slightly higher temperatures, with minimums of 24°C (75°F) and maximums reaching 32°C (90°F); the average sits at 27°C (81°F). Precipitation increases to 62 mm (2.4 in) over 15 days, while humidity remains comparable at 77%. For a detailed breakdown of June's weather, you can check out Monserrate weather in June.
In comparing the weather between December and July, we see notable differences in temperature and precipitation. December experiences slightly cooler temperatures, with an average of 26°C (78°F) and a maximum of 31°C (87°F), while July is warmer, boasting an average temperature of 28°C (82°F) and topping out at 32°C (90°F). Both months have high humidity levels, but July is marginally more humid at 80% compared to December's 76%. Precipitation is also higher in July, with 76 mm (3.0 in) over 17 days, contrasting December's 50 mm (2.0 in) over 16 days. For more specific details on weather during this month, you can explore Monserrate weather in July.
When comparing the weather in December and August, December offers slightly cooler temperatures, with a minimum of 22°C (73°F) and an average high of 31°C (87°F), while August is warmer, starting at a minimum of 25°C (77°F) and peaking at 32°C (90°F). Precipitation is also higher in August, averaging 86 mm (3.4 in) over 18 days compared to December's 50 mm (2.0 in) over 16 days. Humidity remains fairly consistent, with December at 76% and August slightly higher at 80%. For more detailed insights on August weather, you can check Monserrate weather in August.
When comparing the weather in December and September, we see a noticeable shift in temperatures and precipitation levels. December features lower average temperatures, ranging from a minimum of 22°C (73°F) to a maximum of 31°C (87°F), with an average of 26°C (78°F). In contrast, September is warmer overall, with minimum temperatures of 25°C (77°F) and maximums reaching 32°C (90°F), resulting in an average of 28°C (82°F).
Moreover, September experiences significantly higher rainfall, with a total precipitation of 172 mm (6.8 in) over 23 days, compared to December's 50 mm (2.0 in) over 16 days. Humidity levels are also slightly higher in September at 79%, compared to December's 76%. For a more detailed look at the weather patterns during this month, visit Monserrate weather in September.
When comparing the weather in December and October, we find notable differences in temperature and precipitation. In December, temperatures range from a minimum of 22°C (73°F) to a maximum of 31°C (87°F), with an average of 26°C (78°F). By contrast, October tends to be slightly warmer, with a minimum of 24°C (75°F) and a maximum reaching 32°C (89°F), averaging at 27°C (81°F). Additionally, December sees less rainfall, with 50 mm (2.0 in) over 16 days, while October experiences significantly more precipitation, totaling 136 mm (5.3 in) over 22 days. Humidity levels are relatively similar, remaining around 76% in December and slightly higher at 78% in October. For more details on October's weather, you can visit Monserrate weather in October.
In comparing the weather between November and December, we see that December experiences slightly warmer temperatures, with a minimum of 22°C (73°F) and an average of 26°C (78°F), which is very similar to November's minimum of 23°C (74°F) and average of 26°C (80°F). However, December has a maximum temperature of 31°C (87°F), which is marginally higher than November's peak at 30°C (87°F). Precipitation in December totals 50 mm (2.0 in) over 16 days, representing a decrease from November's 93 mm (3.7 in) across 17 days. Both months exhibit high humidity, with December at 76% and November slightly higher at 78%. For more detailed information, you can check Monserrate weather in November.
As December rolls in, Monserrate welcomes a shift in weather, marked by a pleasant average temperature that tends to be milder compared to the warmer months of the year. With peaks reaching up to 31°C and an overall high humidity level of 76%, visitors can expect a tropical ambiance, albeit with more frequent rain, as this month sees increased precipitation days. This combination of warmth and moisture sets a unique backdrop for the celebrations of the season, making it distinct from the drier and hotter months that precede it. For a closer look at the overall climate patterns, check out Monserrate Climate.