Last updated: January 18, 2025
San Sebastián, Puerto Rico, exhibits a tropical rainforest climate as classified by the Köppen-Geiger system (Am), characterized by consistently warm temperatures throughout the year. The climate experiences a minimum temperature of 17°C (63°F) in January, rising to an average of 26°C (78°F). The peak temperature typically reaches 33°C (91°F) in August, illustrating the region's warm weather patterns. This climate profile not only contributes to the rich biodiversity of San Sebastián but also enhances its appeal as a destination for those seeking a warm and vibrant environment.
In San Sebastián, Puerto Rico, the temperature patterns reveal a warm tropical climate with distinct seasonal trends. January marks the cooler start of the year, with minimum temperatures dipping to 17°C (63°F) before gradually increasing as spring approaches. By May, temperatures rise, reaching an average of 26°C (79°F), and this warmth continues into the summer months, peaking at 33°C (91°F) in August and September. Throughout the year, temperatures remain relatively stable, fluctuating between a minimum of 17°C (63°F) and a maximum of 33°C (91°F), with average temperatures consistently hovering around 24°C to 27°C (76°F to 81°F). The mild winters transition into warmer, humid summers, making San Sebastián a haven of warmth and vibrancy year-round.
Juncal, Hato Arriba, and San Sebastian all experience a consistent climate, featuring a minimum temperature of 17°C (63°F) in January and a maximum of 33°C (91°F) in August. For more detailed temperature insights, you can explore the monthly temperatures in Juncal here, in Hato Arriba here, and in San Sebastian here.
San Sebastián, Puerto Rico experiences a notable variation in precipitation throughout the year, with distinct wet and dry periods shaping its climate. January sees relatively low rainfall at 22 mm (0.9 in), gradually increasing to 33 mm (1.3 in) in February. However, the precipitation begins to surge in March, reaching 68 mm (2.7 in) and continuing an upward trend through April and May. The rainy season peaks in September, when the region receives a significant 192 mm (7.6 in) of rainfall, indicating that late summer to early fall is marked by frequent showers and thunderstorms.
The frequency of rainy days also highlights this seasonal pattern, with March, April, and May averaging between 15 to 20 days of precipitation. The summer months, particularly July and August, see an increase in precipitation, accumulating 103 mm (4.1 in) and 106 mm (4.2 in), respectively. As the year progresses, San Sebastián experiences a noticeable drop in rainfall from October to December, where totals fall significantly, with December recording just 28 mm (1.1 in). This rainfall distribution emphasizes the region's tropical rainforest climate, contributing to its lush vegetation and vibrant ecosystems.
San Sebastián, Puerto Rico, showcases a captivating pattern of sunshine duration that reflects its tropical climate. The year begins with 261 hours of sunshine in January, gradually increasing as winter gives way to spring. Notably, March marks a significant rise with 347 hours, and by May, sunshine peaks at 361 hours, highlighting the onset of the summer season. This trend of extended daylight continues through the summer months of June and July, both retaining the same high level of 361 hours, ensuring plenty of golden sunshine that invigorates the region’s lush landscapes.
As summer fades into fall, the sunshine duration begins to taper off, with September and October experiencing 316 hours each. This slight reduction in daylight is typical as the region transitions to cooler months, with November recording 298 hours before December bounces back to 320 hours. Overall, the data underscores a general trend of increasing sunshine from the start of the year, peaking in late spring to midsummer, followed by a gradual decline into autumn. This rhythm of sunlight not only contributes to the area's rich biodiversity but also enhances the allure of San Sebastián as a year-round destination for sun seekers.
The UV Index in San Sebastián, Puerto Rico, fluctuates significantly throughout the year, reflecting its tropical climate and intense sunlight. Starting in January, the UV Index sits at 9, classified as "very high," with a burn time of just 15 minutes. However, as the year progresses, the UV levels escalate, reaching an extreme peak of 14 in May. During this peak sunshine season, the recommended exposure time drops to a mere 10 minutes, emphasizing the necessity for sun protection to prevent skin damage.
The summer months maintain elevated UV Index readings, with values consistently around 13, indicating extreme exposure risk. This trend persists from June through September, making sun safety a crucial consideration for residents and visitors alike. As autumn approaches, the UV Index slightly decreases, dipping to 12 in October and returning to 9 by November, before finishing the year at 8 in December. Despite the seasonal variations, the persistent extreme values throughout the main part of the year highlight the importance of sun safety measures to mitigate the risks associated with high UV exposure in San Sebastián.
UV Risk Categories
In San Sebastián, Puerto Rico, daylight duration exhibits a subtle yet distinct seasonal rhythm throughout the year. January and February maintain consistent daylight at 11 hours, reflecting the shorter days typical of winter. As spring arrives in March, daylight begins to increase, reaching 12 hours in March and persisting at that level through April and May. This gradual escalation continues into the summer months of June and July, where daylight extends to 13 hours, offering ample time for outdoor activities and fostering a vibrant atmosphere in the region.
As summer transitions to fall, daylight begins to wane, returning to 12 hours in August and September. This pattern of diminishing daylight persists into October, November, and December, where the duration drifts back down to 11 hours. Overall, San Sebastián experiences a relatively stable amount of daylight across the year, with only slight variations that follow a predictable seasonal pattern. This consistency contributes to the area's tropical allure, providing plenty of opportunities for residents and tourists to enjoy its natural beauty throughout the year.
Hato Arriba, Puerto Rico, enjoys a warm tropical climate with average temperatures ranging from 24°C (76°F) in winter to 27°C (81°F) in summer. Precipitation is abundant, peaking in September with 192 mm (7.6 in) and maintaining high levels during the summer months. The region experiences the most sunshine in May and July, with about 361 hours, providing ample bright days year-round. Despite higher rainfalls, particularly from May to October, the warmth and sunshine make it an inviting destination. For more detailed information, visit Hato Arriba climate.
The climate in Juncal, Puerto Rico, features warm temperatures throughout the year, averaging between 24°C (76°F) in winter and 27°C (81°F) in summer, with maximum temperatures reaching up to 33°C (91°F) in August and September. Rainfall varies significantly, peaking in September with 192 mm (7.6 in), while January and December are relatively drier with only 22 mm (0.9 in) and 28 mm (1.1 in) respectively. This region enjoys abundant sunshine, particularly in May with 361 hours, creating ideal conditions for outdoor activities. For a detailed understanding of the climate patterns, visit Juncal climate.
San Sebastian, Puerto Rico, enjoys a tropical climate characterized by warm temperatures year-round. Monthly averages range from 24°C (76°F) in winter to 27°C (81°F) during the summer, with maximums soaring up to 33°C (91°F) in August and September. Precipitation peaks in September at 192 mm (7.6 in), while the sun shines the most in May, with 361 hours of sunlight. This charming locale provides a balance of warmth and rain, making it a unique destination for visitors. For more detailed information, visit San Sebastian climate.
In conclusion, San Sebastián, Puerto Rico, boasts a climate characterized by warm temperatures, significant sunshine, and a high UV Index, making it an enticing destination throughout the year. The city experiences a clear seasonal pattern in temperature, with the warmest months peaking during summer. Complementing this warmth are extended periods of daylight, especially in the summer months, allowing for abundant outdoor activities. However, the high UV Index throughout much of the year serves as a reminder for residents and visitors to prioritize sun safety. Overall, the blend of favorable climatic conditions and natural beauty makes San Sebastián a vibrant locale, offering a rich experience for those drawn to its tropical charm.