Last updated: August 31, 2025
May in Humacao, Puerto Rico offers a warm tropical experience characterized by an average temperature of 26°C (79°F), reaching a pleasant maximum of 29°C (85°F) and dipping to around 23°C (73°F) at night. This month sees a notable precipitation total of 109 mm (4.3 in), with rain gracing the area on 26 days, creating a lush landscape. The humidity, sitting at 75%, adds to the tropical atmosphere, making it a vibrant time to visit for those who love the lively interplay of heat and rain in paradise.
In May, Humacao, Puerto Rico, welcomes the warmth of late spring, with temperatures reflecting a delightful increase. The minimum temperature nudges up to 23°C (73°F), while the average settles comfortably at 26°C (79°F), and the maximum reaches 29°C (85°F). This trend of gradually warming temperatures is consistent from the previous months, leading into the summer season. As the days grow longer and sunnier, the vibrant atmosphere invites both residents and visitors to enjoy the lush surroundings and outdoor activities. With the pleasant shift in climate, May presents an ideal backdrop for experiencing the natural beauty and cultural richness of this charming coastal town.
In May, Humacao, Puerto Rico, experiences a notable surge in precipitation, with 109 mm (4.3 in) of rain falling across approximately 26 days. This increase marks a distinct transition into the wet season, showcasing a significant rise from the previous months, which typically see less rainfall. April's precipitation, at 79 mm (3.1 in), sets the stage for May's escalation, while the approaching summer months further amplify rainfall, with June closely mirroring May's totals. As Humacao moves deeper into the rainy season, residents can expect a dance of sunshine and showers, making May a key month in the region's climatic rhythm.
In May, Humacao, Puerto Rico, experiences a humidity level of 75%, maintaining a consistent pattern observed since the start of the year. This slight decrease from the higher levels seen in March and April reflects the region's tropical climate, where humidity typically hovers around the mid-seventies during spring. As the year progresses into the summer months, humidity levels begin to rise, peaking at 80% in July and August. May's humidity suggests a comfortable transition, setting the stage for the warmer, more humid days ahead while still ensuring a pleasant atmosphere for residents and visitors alike.
In May, residents and visitors of Humacao, Puerto Rico, should prepare for an extreme UV Index of 13 and a quick burn time of just 10 minutes. This trend of elevated UV levels begins in February and extends through June, highlighting a consistent warning for sun exposure during these months. As summer approaches, the UV Index often remains at its peak, with barely any respite until November when it finally dips to a very high rating of 9. Thus, it’s crucial for everyone to stay vigilant and protect their skin. For more detailed UV Index insights, be sure to check Humacao UV Index.
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In May, Humacao, Puerto Rico, basks in an impressive 357 hours of sunshine, marking the peak of vibrant springtime. This sunny month continues the upward trend established in earlier spring months, with March and April both enjoying 348 hours of sunlight each. As we transition into summer, May stands out not only for its abundant sunshine but also for setting a foundation for the warmer months ahead. Following May, the sunshine slightly tapers off in June to 344 hours, yet the overall pattern remains consistently bright with ample sun throughout the summer. The gradual decline in sunlight hours towards the fall serves as a gentle reminder of the changing seasons, but May undoubtedly shines as one of the sunniest months in the year, inviting both locals and visitors to revel in its warmth.
May in Humacao, Puerto Rico, brings a 51% chance of sunny weather, which places it squarely in the middle of the year’s forecasts. This slight uptick from April's 44% is encouraging, hinting at the arrival of more pleasant days as the region transitions into late spring. Although this month shows a moderate likelihood of sunshine, it falls short compared to the sunnier winter months, such as February at 65%, and March at 61%. As summer approaches, the chances dip significantly, with June plummeting to 20%. Overall, while May provides a decent opportunity for sunshine, it serves as a bridge to the more variable weather that summer holds.
In Humacao, Puerto Rico, daylight duration gradually evolves throughout the year, revealing a consistent trend towards longer days as spring transitions into summer. Both January and February offer 11 hours of daylight, maintaining a steady rhythm in the heart of winter. As the days grow warmer, March and April usher in 12 hours of sunlight, creating an ideal atmosphere for outdoor activities and community gatherings. This trend peaks in June and July with 13 hours of bright, sunlit days, perfect for enjoying the island's stunning beaches. Come August and September, daylight gracefully dwindles back to 12 hours, before reverting to 11 hours in the final months of the year. Through this evolving pattern, Humacao beautifully showcases the balance between seasonal change and the island's enduring warmth.
In May, Humacao, Puerto Rico experiences a pleasant average wind speed of 4.2 m/s (9 mph), offering a gentle breeze that complements the warm tropical climate. This month marks a slight increase from the calmer winds of April (3.7 m/s or 8 mph), continuing the upward trend as temperatures rise towards the summer. Compared to the earlier months of the year, particularly January and March, where winds hovered around 4.0 m/s and 4.4 m/s, respectively, May maintains a consistent moderate airflow. As the island transitions into the warmer months, the winds pick up slightly again in June, hinting at a seasonal pattern where winds typically intensify from late spring into summer, peaking in July at 5.0 m/s (11 mph). This gradual increase not only enhances the ambiance of outdoor activities but also positions May as a charming prelude to the breezier summer months ahead.
Weather in Humacao varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Humacao, focusing on differences in temperature, rainfall, humidity, and UV levels.
In comparing the weather between May and January, we see that May tends to be slightly warmer, with average temperatures ranging from a minimum of 23°C (73°F) to a maximum of 29°C (85°F), while January's temperatures range from 21°C (70°F) to 28°C (83°F). Precipitation is also markedly higher in May, with 109 mm (4.3 in) over 26 days, compared to January's milder 57 mm (2.3 in) over 17 days. Despite the increase in rainfall during May, the humidity levels remain similar, with May at 75% and January at 76%. For more detailed information, you can check Humacao weather in January.
In comparing the weather of May and February, we see some notable differences. In May, the temperatures range from a minimum of 23°C (73°F) to a maximum of 29°C (85°F), providing a warmer overall average of 26°C (79°F). This month experiences significantly higher precipitation, with 109 mm (4.3 in) spread over 26 days, while maintaining a consistent humidity level of 75%. Conversely, February offers a slightly cooler climate, with temperatures ranging from 21°C (70°F) to 27°C (81°F) and an average of 24°C (76°F). Precipitation in February is lower at 61 mm (2.4 in) across 21 days, yet humidity remains stable at 75%. For more detailed information on February weather, you can visit Humacao weather in February.
When comparing the weather in March and May, both months exhibit warm temperatures, but May edges out slightly warmer. In March, the temperatures range from a minimum of 22°C (72°F) to a maximum of 28°C (82°F), averaging around 25°C (76°F). In contrast, May features slightly higher temperatures, with a minimum of 23°C (73°F) and a maximum of 29°C (85°F), averaging 26°C (79°F). Precipitation is another distinguishing factor; March has 78 mm (3.1 in) of rain over 22 days, while May experiences more rainfall at 109 mm (4.3 in) spread across 26 days. Humidity levels are also comparable, with March at 74% and May slightly higher at 75%. For a detailed look at March's weather in Humacao, check out Humacao weather in March.
In comparing the weather between April and May, we see that both months enjoy similar temperature ranges, with May slightly warmer overall. In April, temperatures range from a minimum of 22°C (71°F) to a maximum of 29°C (84°F), while May has a minimum of 23°C (73°F) and the same maximum. Precipitation is notably higher in May, with 109 mm (4.3 in) falling over 26 days compared to April's 79 mm (3.1 in) over 20 days. Despite both months experiencing high humidity levels of 75%, May tends to be a wetter month, leading to a more humid environment overall. For a closer look at April's weather, you can visit Humacao weather in April.
May and June present similar weather patterns, with June experiencing slightly warmer temperatures overall. In May, the average temperature ranges from a minimum of 23°C (73°F) to a maximum of 29°C (85°F), while June sees a minimum of 24°C (75°F) and a maximum of 30°C (87°F). Both months have comparable precipitation levels, with May receiving 109 mm (4.3 in) and June slightly higher at 110 mm (4.3 in), occurring over 26 days in both months. Humidity also trends upwards in June, reaching 77%, compared to May’s 75%. For more detailed insights, you can check Humacao weather in June.
In comparing the weather of May and July, both months experience warm temperatures, but July tends to be slightly warmer overall. May has a minimum temperature of 23°C (73°F) and an average of 26°C (79°F), while July features a minimum of 24°C (75°F) and an average of 27°C (81°F). Additionally, July receives more precipitation, totaling 149 mm (5.9 in) compared to May's 109 mm (4.3 in), and it experiences rain on 27 days versus 26 days in May. Humidity also rises in July, reaching 80% compared to May’s 75%. For more detailed information about conditions in July, you can visit Humacao weather in July.
In comparing the weather between May and August, both months showcase warm temperatures, but August tends to be slightly warmer. In May, temperatures range from a minimum of 23°C (73°F) to a maximum of 29°C (85°F), while August sees a minimum of 24°C (76°F) and a maximum of 30°C (87°F). Humidity levels are higher in August at 80% compared to May's 75%. Additionally, August experiences more precipitation, with 153 mm (6.0 in) recorded over 27 days, versus May’s 109 mm (4.3 in) over 26 days. For more detailed weather insights, check out Humacao weather in August.
May and September in Humacao showcase distinct weather patterns, with both months enjoying warm temperatures. May typically experiences a minimum temperature of 23°C (73°F) and averages around 26°C (79°F), peaking at 29°C (85°F). In contrast, September sees slightly warmer conditions, with minimum temperatures of 24°C (76°F) and an average high of 31°C (88°F).
However, September is notably wetter, receiving 195 mm (7.7 in) of precipitation over 28 days compared to May's 109 mm (4.3 in) spread across 26 days. The humidity also rises marginally from 75% in May to 79% in September, making September feel a bit more muggy. For more detailed insights into September weather, you can visit Humacao weather in September.
May and October display similar temperature ranges, with May having a minimum of 23°C (73°F) and an average of 26°C (79°F), while October starts slightly warmer at a minimum of 24°C (75°F) and averages around 27°C (81°F). Both months experience high humidity levels, with May at 75% and October slightly higher at 78%. However, October receives significantly more rainfall, totaling 187 mm (7.4 in) compared to May's 109 mm (4.3 in), despite both months experiencing precipitation on 26 days. For more detailed insights on weather conditions, you can explore Humacao weather in October.
May and November share similar temperatures, with both months experiencing minimums around 23°C (73°F), averages of 26°C (79°F), and maximums reaching 29°C (85°F). However, November tends to be slightly wetter, receiving 131 mm (5.2 in) of precipitation compared to May's 109 mm (4.3 in), with nearly the same number of rainy days—25 in November and 26 in May. Humidity levels also rise slightly in November, averaging 78% compared to May’s 75%. For more detailed information on November weather, you can visit Humacao weather in November.
In May, the weather is characterized by a warm tropical climate with temperatures averaging around 26°C (79°F) and humidity levels at 75%. It experiences more precipitation, with an average rainfall of 109 mm (4.3 in) spread over 26 days. In contrast, December maintains a similar temperature range, with an average of 26°C (78°F) and a slightly higher humidity of 76%, but it sees less rainfall, with 81 mm (3.2 in) over 24 days. This results in a drier overall month compared to May. For more detailed insights about December's weather, you can explore Humacao weather in December.
As May unfolds in Humacao, it brings a blend of warm temperatures and significant humidity that sets it apart from the preceding months. With an average temperature hovering around a comfortable 26°C, outdoor activities are inviting, though it's essential to prepare for the frequent rainfall, as this month sees a notable increase in precipitation days. The atmosphere can feel quite muggy, contributing to the overall tropical vibe of the area. For those looking to plan their visit, understanding the unique May climate nuances can greatly enhance their experience. Dive deeper into what to expect throughout the year by checking out Humacao Climate.