Last updated: January 18, 2025
The climate of Arroyo, Puerto Rico, classified under the Köppen-Geiger system as Aw, presents a tropical wet and dry atmosphere characterized by warm temperatures year-round. January marks the coldest month with a minimum temperature averaging around 21°C (70°F), while the region experiences a pleasant average temperature of 26°C (78°F). The warmest period occurs in September, where maximum temperatures can peak at 30°C (86°F). This consistent warmth, paired with distinct wet and dry seasons, shapes the vibrant ecosystems and agricultural practices in this picturesque coastal town.
Arroyo, Puerto Rico, exhibits a mild tropical climate with relatively consistent temperatures throughout the year, characterized by subtle seasonal variations. January and February maintain a minimum temperature of around 21°C (70°F), with daytime averages hovering around 24°C (76°F), while the peaks reach 27°C (81°F). As the year progresses into March and April, temperatures begin to gradually rise, with April marking the onset of warmer conditions as averages reach 25°C (77°F). The warmest months commence in May and persist through September, featuring average highs of 27°C (81°F) to 30°C (86°F), with August and September typically showcasing the highest temperatures. The transition to October brings a slight cooling trend, with temperatures returning to the mid-24°C range, and November and December exhibit a gentle decline, maintaining comfortable conditions around 25°C (77°F), reflecting a stable yet warm tropical climate seamlessly throughout the year.
Arroyo, Puerto Rico, experiences a distinct seasonal rainfall pattern, with precipitation levels varying significantly throughout the year. The year begins with relatively low rainfall in January at 48 mm (1.9 in), gradually increasing to 51 mm (2.0 in) in February. By March and April, precipitation rises further, reaching 64 mm (2.5 in) and 67 mm (2.7 in), respectively. The late spring months of May and June signal a marked increase in rainfall, accumulating 97 mm (3.8 in) and 92 mm (3.6 in), setting the stage for the wet summer season.
The peak of the rainy season occurs from July to September, where Arroyo witnesses its highest precipitation levels. July receives a substantial 139 mm (5.5 in), while August follows closely with 134 mm (5.3 in), culminating in September, which averages 190 mm (7.5 in) of rainfall. This trend remains consistent into October at 165 mm (6.5 in), before gradually tapering off in November and December with 119 mm (4.7 in) and 67 mm (2.6 in), respectively. The frequency of rainy days peaks during the summer months, notably with 27 days in September, contributing to Arroyo's lush tropical landscape.
In Arroyo, Puerto Rico, sunshine duration exhibits a consistent seasonal progression, highlighting a steady increase from winter to summer. Starting with 260 hours of sunshine in January, the region experiences a gradual rise, reaching 305 hours in February. A more pronounced surge occurs in the spring months, with March and April basking in 347 hours and 348 hours of sunlight, respectively. The arrival of May introduces a peak in sunshine hours at 359 hours, showcasing the transition into the summer season, where the days grow longer and brighter.
As summer unfolds, Arroyo continues to enjoy abundant sunshine, with June providing 345 hours and July slightly increasing to 355 hours. Although there is a slight decrease in sunlight during August to 351 hours, the overall trend remains robust. The late summer and early autumn months see a gradual decline, yet still maintain substantial sunshine, with September at 317 hours and October at 315 hours. The year closes with November and December recording 303 hours and 320 hours of sunshine, respectively, indicating a reliable year-round brightness that enhances Arroyo's tropical appeal yet highlights a noticeable seasonal shift.
Arroyo, Puerto Rico, experiences a notably high UV Index throughout the year, emphasizing the importance of sun safety for residents and visitors alike. Beginning in January, the UV Index is measured at 9, categorized as "very high," with an estimated burn time of 15 minutes. As the year progresses into February, the UV Index escalates to 11, indicating an "extreme" level of exposure and a reduced burn time of just 10 minutes. This trend of increasing UV intensity continues into March and maintains its peak during the summer months, with the UV Index consistently reaching 13 from April to August.
The highest UV exposure is recorded in September, where the index peaks at 14, reinforcing the need for protective measures. As the weather cools towards the end of the year, the UV Index slightly decreases, yet it remains in the "very high" category at 9 for both November and December, requiring a burn time of 15 minutes. Overall, the persistent high UV Index in Arroyo necessitates conscious sun protection practices year-round, particularly during the summer months when exposure levels are at their most intense.
UV Risk Categories
Arroyo, Puerto Rico, enjoys a relatively consistent pattern of daylight duration throughout the year, characterized by only slight variances. In the winter months of January and February, the community experiences 11 hours of daylight each day, providing a stable but shorter light period. As spring arrives in March, daylight begins to gradually increase, reaching 12 hours by the end of the month and remaining steady through April and May. This period of extended daylight encourages outdoor activities and enhances the tropical lifestyle.
The summer months, particularly June and July, are marked by the longest daylight duration at 13 hours, allowing for ample time to enjoy the natural beauty of the region. As summer transitions into fall, the daylight duration returns to 12 hours in August and September, then decreases again to 11 hours in October, November, and December. This cyclical pattern of daylight reflects Arroyo's tropical climate, ensuring that residents experience a balanced rhythm of light and darkness year-round, which is integral to both their daily lives and the region's diverse ecosystems.
Arroyo, Puerto Rico, enjoys a tropical climate characterized by warm temperatures and seasonal rainfall. Average monthly temperatures range from a minimum of 21°C (70°F) in January to a high of 30°C (86°F) in September. The region experiences its highest precipitation in September (190 mm), while the drier months are typically January and December, with around 48 mm and 67 mm respectively. Sunshine is plentiful, peaking in May with 359 hours and remaining substantial throughout the year. For more detailed information, visit Arroyo climate.
Buena Vista, Puerto Rico, enjoys a tropical climate characterized by warm temperatures throughout the year, averaging between 24°C (76°F) and 27°C (81°F). The warmest months are typically from May to September, with maximum temperatures reaching up to 30°C (86°F) in September. Precipitation is heaviest from July to September, with September recording an average of 190 mm (7.5 in). Despite the rainfall, the region basks in abundant sunshine, peaking in May with 359 hours. For more detailed information, visit Buena Vista climate.
Palmas, Puerto Rico features a tropical climate characterized by warm temperatures year-round, with average monthly highs ranging from 24°C (76°F) in January to 30°C (86°F) in September. Rainfall is more prevalent from May to October, with September experiencing the highest precipitation at 190 mm (7.5 in). The region enjoys ample sunshine, particularly in May, which boasts 359 hours of sun. Despite the wet season, the overall climate remains inviting for outdoor activities. For more details, visit Palmas climate.
Yaurel, Puerto Rico enjoys a tropical climate characterized by warm temperatures year-round, with January and February having average highs around 24-27°C (76-81°F) and peaking in the summer months at 29-30°C (84-86°F). The wettest months are September and October, with rainfall averaging 190 mm (7.5 in) and 165 mm (6.5 in), respectively. Sunshine is abundant, particularly from May to July, where it can exceed 350 hours per month. For more information on the climate in Yaurel, visit Yaurel climate.
In conclusion, Arroyo, Puerto Rico, is characterized by its warm climate, abundant sunshine, high UV exposure, and consistent daylight duration throughout the year. The tropical wet and dry climate promotes vibrant ecosystems, supported by varying precipitation patterns that encourage lush growth. With a UV Index that frequently reaches extreme levels, sun safety remains a crucial consideration for both locals and visitors, particularly during the summer months when daylight extends up to 13 hours. The combination of these climatic factors not only shapes the daily experiences of Arroyo's inhabitants but also underscores the importance of respecting and preserving the natural environment in this beautiful coastal town.