Last updated: January 18, 2025
Cayey, Puerto Rico, exhibits a Köppen-Geiger climate classification of Am, indicative of a tropical monsoon environment. The region experiences a minimum temperature of 18°C (65°F) in January, characterized by cooler conditions, while the average temperature hovers around 25°C (78°F), providing a warm and inviting atmosphere year-round. Peaks in temperature are observed during September, with maximum levels reaching 32°C (90°F), highlighting the seasonal variation within this lush tropical locale. The interplay of warm temperatures and ample rainfall contributes to the unique ecological diversity found in Cayey.
In Cayey, Puerto Rico, temperature patterns reveal a warm tropical climate with subtle seasonal variations. January marks the coolest month, starting with a minimum temperature of 18°C (65°F) and gradually warming to an average of 24°C (75°F). As the year progresses, temperatures gently rise, peaking in May and June when the minimum reaches 22-23°C (71-73°F) and average highs touch 26-27°C (79-80°F). The summer months of July and August maintain these warm conditions, consistently hovering around 31°C (88°F) for maximum temperatures. The transition into autumn in September introduces the year's highest maximum temperature of 32°C (90°F), before cooling slightly in October and November, with averages returning to about 25°C (78°F). Despite these fluctuations, Cayey enjoys a predominantly warm climate throughout the year, shaped by its tropical location.
In G. L. Garcia, temperatures range from a minimum of 19°C (66°F) in January to a maximum of 32°C (90°F) in September, as detailed in the link: monthly temperatures in G. L. Garcia. Similarly, Cayey experiences a minimum temperature of 18°C (65°F) in January and peaks at 31°C (87°F) in August, as outlined in this link: monthly temperatures in Cayey.
Cayey, Puerto Rico, experiences a distinct precipitation pattern throughout the year, with notable increases during the summer and fall months. January and February see relatively modest rainfall, measuring 43 mm (1.7 in) and 46 mm (1.8 in) respectively, while maintaining around 14 to 15 rainy days. As spring approaches, March marks a shift with 71 mm (2.8 in) of precipitation over 18 days, escalating further into April and May, where rainfall increases to 69 mm (2.7 in) and 87 mm (3.4 in), respectively. This trend continues into June, with 85 mm (3.3 in), suggesting a gradual buildup toward the peak rainy season.
The onset of summer brings even more substantial rainfall, particularly from July to September. July and August experience their highest levels, with precipitation reaching 115 mm (4.5 in) and 118 mm (4.6 in), respectively, and November and December also remain significant, bringing 56 mm (2.2 in). September stands out as the wettest month, accumulating a remarkable 186 mm (7.3 in) over 26 days. This seasonal increase in rainfall, peaking in late summer and early fall, underscores the region's tropical monsoon climate, contributing to its lush landscapes and rich biodiversity.
Cayey, Puerto Rico, showcases a remarkable seasonal variation in sunshine duration, with hours of sunlight steadily increasing from winter into summer. January begins the year with 259 hours of sunshine, and this number gradually climbs month by month. By March, sunshine peaks at 346 hours, leading into April and May where it reaches an impressive 348 hours and 358 hours, respectively. This upward trend highlights the transition from the cooler winter months to the brighter, warmer days of spring and early summer, making May a standout month in terms of daylight.
As summer unfolds, Cayey continues to enjoy substantial sunshine, particularly in July when it records 355 hours. The sunshine hours then slightly decline, yet remain robust in August (351 hours) and September (315 hours), suggesting that while afternoons may bring occasional rain, abundant sun persists during these months. By October, the hours of sunshine taper off to 313 hours, with November closing the year at 300 hours. Overall, this seasonal pattern not only emphasizes the long and sunny summers in Cayey but also reflects a gradual yet noticeable decrease in sunlight as the region approaches winter, ensuring a vibrant climate year-round.
Cayey, Puerto Rico, experiences consistently high levels of ultraviolet (UV) radiation throughout the year, with the UV Index frequently reaching very high to extreme levels. In January, the UV Index begins at 9, indicating very high exposure risk, which subtly escalates to 11 in February. As spring approaches, the UV radiation intensifies, peaking in April and May with an impressive UV Index of 14. These months are crucial for sun safety awareness, as the burn time for unprotected skin is just 10 minutes, emphasizing the need for precautionary measures such as sunscreen and protective clothing.
The trend of extreme UV Index levels continues into the summer, with June through August maintaining values around 13. September sees a slight increase to 14, underscoring the region's persistent exposure to harmful UV rays. As the year draws to a close, November and December witness a drop back to a UV Index of 10 and 9, respectively, categorizing them as very high but offering slightly more leeway with burn times increasing to 15 minutes. Overall, Cayey's UV Index highlights the importance of sun protection, especially from March to September when the risk of skin damage is at its highest.
UV Risk Categories
Cayey, Puerto Rico, experiences a relatively consistent daylight duration throughout the year, with minor fluctuations marking the transition between seasons. In the winter months of January and February, the region enjoys about 11 hours of daylight, providing a steady yet shorter exposure to sunlight during the cooler period. As spring approaches in March, daylight extends to 12 hours, continuing through April and May, which further emphasizes the gradual increase in sunlight as the weather becomes warmer and more inviting.
The trend towards longer days peaks during the summer months of June and July, with both months receiving 13 hours of daylight. This abundance of light promotes outdoor activities and enriches the tropical environment. As summer transitions to fall, daylight duration reverts to 12 hours from August to September. Once October arrives, daylight begins to decrease again to 11 hours, a pattern that continues through November and December. This cyclical nature of daylight in Cayey reflects the region's tropical climate and helps create a balanced and enjoyable environment for residents and visitors year-round.
Cayey, Puerto Rico, experiences a tropical climate characterized by warm temperatures throughout the year. Average monthly temperatures range from a low of 18°C (65°F) in January to a high of 31°C (87°F) in August, with consistent warmth and minimal temperature variation. Rainfall peaks from September to November, with September receiving the most precipitation at 173 mm (6.8 in). Despite the rainy season, Cayey enjoys ample sunshine, particularly in May, which boasts 359 hours of sunlight. For more detailed information, visit Cayey climate.
The climate in G. L. Garcia, Puerto Rico, features warm temperatures year-round, with averages ranging from 24°C (76°F) in January to 27°C (81°F) during the summer months. The region experiences its highest rainfall in September, accumulating 200 mm (7.9 inches), while December sees the least precipitation at 66 mm (2.6 inches). Sunshine is abundant, peaking in May with 356 hours, ensuring plenty of bright days throughout the year. Overall, residents enjoy a tropical climate characterized by warm temperatures, sunny skies, and seasonal rainfall. For more detailed information, visit G. L. Garcia climate.
In conclusion, Cayey, Puerto Rico, exemplifies a tropical climate characterized by warm temperatures, substantial rainfall, and high UV exposure throughout the year. The seasonal variations in temperature, precipitation, sunshine duration, and daylight illustrate the dynamic nature of this locale, fostering a rich biodiversity and an appealing environment for outdoor activities. As residents and visitors alike navigate the intense UV Index and embrace the sunny days, awareness and preparation are essential to fully enjoy the vibrant landscape. Overall, Cayey serves as a captivating example of the interplay between climate and environmental conditions, underscoring the significance of understanding weather patterns in this enchanting region.