Last updated: August 31, 2025
December in San Germán, Puerto Rico offers a delightful tropical experience, with maximum temperatures reaching 30°C (86°F) and an average of 26°C (78°F), creating a warm and inviting atmosphere. The month sees a minimum temperature of 22°C (72°F), perfect for enjoying the outdoors. While the beauty of the region is often accompanied by a bit of rain, December typically brings only 25 mm (1.0 in) of precipitation over about 7 days, resulting in a relatively dry month. With an average humidity of 77%, visitors can expect a comfortable yet slightly humid climate, ideal for exploring the rich culture and stunning landscapes of this charming town.
In December, San German, Puerto Rico enjoys pleasant temperatures that beautifully bridge the warmer months of the year. The minimum temperature settles at a comfortable 22°C (72°F), while the average temperature hovers around a delightful 26°C (78°F). As the month unfolds, daytime highs can reach up to 30°C (86°F). This slight drop from the hotter summer months signifies the onset of a milder season, making December an enticing time to explore the area's rich culture and scenic landscapes. With these inviting temperatures, it's no wonder that visitors flock to enjoy the island's tropical charm during this festive time of year.
In San Germán, Puerto Rico, December typically heralds the onset of a drying trend, with average precipitation dipping to 25 mm (1.0 in) over approximately 7 days of rainfall. This marks a significant reduction compared to the wetter months preceding it, particularly the high moisture of September, which sees a staggering 159 mm (6.2 in) across 21 days. While December still receives some rain, the amount is notably lighter and less frequent, making it a transitional month as the region shifts from the peak of the rainy season to drier conditions. Observing these patterns, it's clear that December serves as a gentle reminder of the easing of humidity and the approach of drier winter months ahead.
In December, San Germán, Puerto Rico experiences a humidity level of 77%, which is slightly lower than the peak levels seen in the summer months. Throughout the year, humidity tends to fluctuate, with the warmest months of July and August reaching their peak at 81% and 80%, respectively. This seasonal pattern highlights a gradual increase in humidity from the drier winter months of January through April, consistently hovering around 75-76%. As the year winds down, December’s level reflects a transition toward the more humid conditions typical of late spring and summer, making it part of a well-defined trend of increasing moisture leading into the warmer months.
In December, San Germán, Puerto Rico, sees a UV Index of 8, categorized as very high, with a recommended burn time of about 15 minutes. This marks a slight decline from the extreme levels experienced in the preceding months, where figures peaked at a remarkable UV Index of 14 in May. The overall trend from January through November shows consistently high UV exposure, characterized by several months hovering around the extreme category, particularly from February to October. As winter approaches, there’s a shift to a somewhat milder but still significant UV level, reminding residents and visitors alike to stay vigilant about sun safety. For more detailed information about UV exposure in this region, check the San German UV Index.
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In San Germán, Puerto Rico, December offers a delightful retreat into sunshine, boasting 320 hours of bright, cheerful days. As the year draws to a close, the trend reveals a steady glow, with the number of sunshine hours peaking in the warmer months of May and June. After this radiant crescendo, a gentle decrease unfolds, yet December retains a remarkable warmth compared to earlier months. The consistency in sunshine, particularly as the cooler season approaches, invites both locals and visitors to bask in the island's vibrant atmosphere, making December an ideal time to enjoy San Germán’s natural beauty and festive spirit.
In December, San German, Puerto Rico, boasts a 70% chance of sunny weather, making it a delightful month to enjoy the tropical scenery. Compared to the preceding months, this figure stands out, reflecting a notable increase from November's 61%. As the year winds down, the likelihood of sunshine rises from its seasonal lows in June and July, where the chances dip to 32% and 49% respectively. This trend highlights a transition into sunnier spells, offering residents and visitors alike ample opportunities to bask in the warmth before the year ends. Overall, December presents a promising outlook for those seeking sun-soaked adventures in this vibrant Caribbean locale.
In San German, Puerto Rico, the rhythm of daylight shifts subtly throughout the year, creating a captivating cycle of light. December, like its preceding months of October and November, offers 11 hours of daylight, a tranquil continuance of the shorter days that characterize the island's winter season. As the year unfolds, the daylight gradually increases, peaking in the summer months of June and July with 13 hours basking this vibrant locale. Following the summer, daylight begins to taper off again, returning to 11 hours by the year's end. This gentle ebb and flow of sunlight not only marks the passage of time but also enriches the lush landscapes and vibrant culture of San German, creating a unique connection between the island's inhabitants and the natural world around them.
In San Germán, Puerto Rico, the wind tends to dance through December at an average speed of 4.2 m/s (9 mph), providing a refreshing embrace as the year comes to a close. Notably, this month’s wind speed mirrors both the calmness of January and the gentle breezes of April, suggesting a subtle return to more serene conditions after the slight uptick experienced in the summer. While July records the peak winds at 5.1 m/s (12 mph), December's breezes offer a delightful interlude, making it a comfortable time for outdoor activities. This trend highlights a typical coastal dynamic, where the winds are at their most playful during warmer months but settle into a pleasing rhythm as winter approaches.
Weather in San German varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in San German, focusing on differences in temperature, rainfall, humidity, and UV levels.
In December, temperatures in San German range from a minimum of 22°C (72°F) to a maximum of 30°C (86°F), with an average of 26°C (78°F). The month experiences 25 mm (1.0 in) of precipitation over about 7 days, contributing to a humidity level of 77%. In contrast, January sees slightly cooler temperatures, with a minimum of 19°C (67°F) and a maximum of 29°C (84°F), averaging 25°C (77°F). Precipitation decreases to 18 mm (0.7 in) spread over just 4 days, and humidity is marginally lower at 76%. For more detailed information, you can visit San German weather in January.
In December, the weather is characterized by slightly warmer temperatures, with a minimum of 22°C (72°F) and an average of 26°C (78°F), peaking at 30°C (86°F). The month typically experiences around 25 mm (1.0 in) of precipitation over 7 days and a humidity level of 77%. In contrast, February sees a marginally cooler climate, where the minimum temperature is 21°C (70°F), averaging 25°C (77°F) and reaching a maximum of 29°C (85°F). Precipitation is slightly higher at 26 mm (1.0 in) but occurs over just 5 days, with a humidity level of 75%. For more details on February weather, you can visit San German weather in February.
December and March present similar yet distinct weather patterns. In December, temperatures range from a minimum of 22°C (72°F) to a maximum of 30°C (86°F), with an average of 26°C (78°F). The month sees about 25 mm (1.0 in) of precipitation over 7 days, with humidity levels around 77%. In contrast, March offers slightly cooler temperatures, with a minimum of 21°C (69°F), an average of 24°C (76°F), and a maximum of 28°C (83°F). However, March experiences higher precipitation, totaling 49 mm (1.9 in) across 11 days, while humidity remains relatively stable at 75%. For more detailed insights, you can check San German weather in March.
In December, the weather tends to be warmer with temperatures ranging from a minimum of 22°C (72°F) to a maximum of 30°C (86°F), and an average of 26°C (78°F). The month experiences relatively low precipitation, with 25 mm (1.0 in) spread over about 7 days, resulting in a humidity level of 77%. In contrast, April sees slightly cooler temperatures, with a minimum of 21°C (70°F) and a maximum of 29°C (84°F), and an average of 25°C (77°F). However, April is wetter, receiving 49 mm (1.9 in) of rain over 14 days, while maintaining a similar humidity of 76%. For a more detailed look at the weather in April, you can visit San German weather in April.
In December, the weather in San German features slightly cooler temperatures, with a range from 22°C (72°F) to a maximum of 30°C (86°F) and an average of 26°C (78°F). While precipitation is relatively low at 25 mm (1.0 in) over about 7 days, humidity hovers around 77%. In contrast, May sees minimal changes in temperature, maintaining a min of 23°C (73°F), an average of 26°C (79°F), and a max of 30°C (86°F). However, May experiences significantly higher precipitation, totaling 59 mm (2.3 in) across approximately 12 days, and a slightly lower humidity level of 76%. For more detailed information, visit San German weather in May.
In December, the weather in San German features warm temperatures with a minimum of 22°C (72°F) and an average of 26°C (78°F), peaking at a maximum of 30°C (86°F). The month receives about 25 mm (1.0 in) of rain over approximately 7 days, resulting in a humidity level of 77%. In contrast, June experiences slightly warmer conditions, with a minimum of 23°C (75°F), an average of 27°C (80°F), and a maximum of 31°C (88°F). However, June is wetter, with precipitation measuring 53 mm (2.1 in) across about 12 days and a similar humidity level of 78%. For a more detailed look at the specific weather conditions in June, you can check out San German weather in June.
When comparing the weather in December and July, a few notable differences emerge. December tends to be slightly cooler, with average temperatures ranging from a minimum of 22°C (72°F) to a maximum of 30°C (86°F), while July sees a higher minimum of 24°C (75°F) and a maximum of 31°C (88°F). Precipitation levels also vary significantly, with December experiencing 25 mm (1.0 in) over 7 days, compared to July's 86 mm (3.4 in) across 16 days. Additionally, humidity levels in July are marginally higher at 81%, compared to December's 77%. For a closer look at July's weather patterns, you can visit San German weather in July.
When comparing the weather in December and August, December typically offers slightly cooler temperatures, with minimums around 22°C (72°F) and maximums reaching up to 30°C (86°F), while August sees higher temperatures, with minimums of 23°C (74°F) and maximums hitting 32°C (90°F). December experiences less precipitation, with about 25 mm (1.0 in) over 7 days, compared to August's 96 mm (3.8 in) over 16 days. Additionally, humidity levels in December average around 77%, slightly lower than the 80% average humidity in August. For more detailed information, you can check San German weather in August.
In comparing the weather of December and September, December features slightly cooler temperatures, with a minimum of 22°C (72°F) and an average of 26°C (78°F), while September tends to be warmer, with temperatures ranging from a minimum of 24°C (76°F) to a maximum of 32°C (90°F). Precipitation levels also differ significantly, as December receives a relatively modest 25 mm (1.0 in) over 7 days, whereas September experiences heavy rainfall with 159 mm (6.2 in) across 21 days. Humidity levels remain fairly consistent, with December at 77% and September at 79%. For more specific details on September weather patterns, you can check San German weather in September.
In comparing the weather conditions of December and October, we see that December tends to be slightly cooler, with average temperatures ranging from a minimum of 22°C (72°F) to a maximum of 30°C (86°F). In contrast, October's temperatures are a bit warmer, with a minimum of 24°C (75°F) and a maximum of 31°C (88°F). Additionally, October experiences significantly higher precipitation, recording 102 mm (4.0 in) over 20 days, compared to December’s 25 mm (1.0 in) over just 7 days. Despite the slight decrease in humidity during December, which is at 77%, both months maintain a relatively high humidity level, with October at 78%. For more details on October weather, you can visit San German weather in October.
In comparing the weather between November and December, we observe that December boasts slightly warmer average temperatures, ranging from a minimum of 22°C (72°F) to a maximum of 30°C (86°F), while November has a slightly higher minimum temperature of 23°C (73°F) and a peak of 31°C (88°F). Precipitation in December is significantly lower, totaling 25 mm (1.0 in) over just 7 days, compared to November's 91 mm (3.6 in) spread across 15 days. Humidity levels remain similar in both months, with December at 77% and November at 78%. For a more detailed look at the weather in November, check out San German weather in November.
In December, San Germán enjoys a pleasant transition into the cooler season, marked by mild average temperatures that contrast with the hotter summer months. While the average stays comfortably around 26°C, it's a noticeable change from the sweltering highs of previous months. Though precipitation is present with about 25 mm over a week, the humidity remains relatively high at 77%, creating a distinct tropical feel that is refreshing compared to the drier conditions of late summer. This unique blend of warmth and moisture makes December an ideal time to experience the enchanting beauty of San Germán. For a deeper dive into the year-round climate, check out San German Climate.