Last updated: August 31, 2025
In Arecibo, Puerto Rico, May brings warm tropical weather characterized by a maximum temperature of 32°C (91°F) and an average of 26°C (79°F), creating an inviting atmosphere for outdoor activities. However, the month also sees a minimum temperature of 22°C (73°F), providing some respite from the heat. With 98 mm (3.9 in) of rain over 16 days, this period is marked by occasional showers that contribute to the region’s lush scenery. Moreover, humidity levels hover around 75%, enhancing the tropical vibe. May in Arecibo is a perfect blend of warmth and moisture, ideal for those who embrace the vibrant Caribbean climate.
In May, Arecibo, Puerto Rico, experiences a delightful transition as temperatures rise, marking the beginning of the warmer season. With a minimum temperature of 22°C (73°F) and a maximum reaching 32°C (91°F), the month showcases a pleasant average of 26°C (79°F). This upward trend in temperature from April's milder conditions indicates a shift towards hotter days, drawing in both locals and tourists eager to bask in the tropical sunshine. As the mercury climbs, strong, warm breezes and vibrant tropical flora highlight Arecibo’s natural beauty, making May a perfect time for outdoor adventures and soaking up the island's radiant charm.
May marks a significant shift in precipitation in Arecibo, Puerto Rico, with rainfall reaching 98 mm (3.9 in), making it the wettest month so far this year. This increase comes on the heels of April's 79 mm (3.1 in), highlighting a notable upward trend as spring transitions into summer. Interestingly, May's rainfall is accompanied by 16 rainy days, aligning with the wetter pattern emerging in the months prior. As the region gears up for summer, the consistent rise in both precipitation volume and frequency of rainy days sets the stage for the impending wet season, culminating in the heavier rains characteristic of late summer. The gradual climb in May precipitation suggests not only an increase in moisture but also the potential for lush landscapes as the growing season unfolds.
In Arecibo, Puerto Rico, May experiences a relative humidity level of 75%, which aligns closely with the preceding months of April and February. This stability in humidity is notable as it marks a transition before the summer months, where June and July see a rise in humidity levels to 77% and 80% respectively. Overall, the month of May reflects a consistent mid-range humidity that sets the stage for the warmer, more humid conditions typical of the summer season. With humidity levels primarily hovering around the mid-70s during this spring month, Arecibo embraces a comfortable, tropical climate, inviting both residents and visitors alike to enjoy its vibrant surroundings.
As we step into May in Arecibo, Puerto Rico, the UV Index soars to an impressive 14, marking it as the highest level of the year and categorizing it within the extreme exposure category. With a burn time of just 10 minutes, the sun’s rays are particularly potent this month, underlining the critical need for sun protection. Building on the trends from earlier months, both March and April were already sitting at a UV Index of 13, signaling a consistent demand for vigilance against sun damage as the region gears up for summer. Following this peak in May, the UV levels remain intense into June and July at 13, demonstrating Arecibo's continuous exposure to strong UV radiation. To understand more about how to stay safe under the sun, visit Arecibo UV Index.
UV Risk Categories
May in Arecibo, Puerto Rico, shines particularly bright with an impressive 359 hours of sunshine, making it one of the sunniest months of the year, alongside July. As the days lengthen from January to May, the region experiences a consistent upward trend in sunshine, peaking in these vibrant late spring days. Following May, sunshine hours settle slightly in June and remain robust throughout the summer, underscoring Arecibo's enchanting allure for sun-seekers. This steady availability of sunlight not only enhances the landscape’s natural beauty but also invites outdoor adventures, establishing May as an ideal time to bask in the warmth and vibrancy of Puerto Rico.
In Arecibo, Puerto Rico, the likelihood of sunny weather in May stands at 53%, a slight uptick from April's 49%. This moderate chance reflects a generally hopeful trend as the region transitions from the cooler months into early summer. Notably, February boasts a peak with a 75% chance of sunshine, while the subsequent months, excluding November's 62%, tend to experience fluctuating sun probabilities. As summer approaches, the chances diminish significantly, with June dropping to 29%. Thus, May serves as a pivotal month, capturing the last vestiges of favorable conditions before the rainy season takes hold.
In Arecibo, Puerto Rico, the variation in daylight duration throughout the year reveals a subtle yet captivating pattern. From January to April, residents enjoy a steady 11 to 12 hours of daylight, reflecting a gradual transition as spring approaches. By May, daylight stabilizes at 12 hours, perfectly mirroring the previous month and setting the stage for the summer's longer days. As June and July roll in, daylight peaks at an impressive 13 hours, inviting more outdoor activities and lively celebrations. Then, as summer fades into autumn, the daylight duration gently declines again, returning to 11 hours by November and December. This ebb and flow of sunlight not only marks the changing seasons but also enriches the vibrant lifestyle of Arecibo’s community.
In Arecibo, Puerto Rico, the month of May features an average wind speed of 4.0 m/s (9 mph), which is noticeably lower than the preceding months of January through April. February stands out as the windier month with an average of 5.2 m/s (12 mph), while April experiences a gentle dip to 3.5 m/s (8 mph). May's winds, though milder, set the stage for a gradual increase in the summer months, where June and July see a resurgence to 4.7 m/s (11 mph) and 5.1 m/s (11 mph), respectively. This trend suggests that while May brings a temporary lull, the wind patterns are primed to pick up again, ushering in the warm summer breezes that characterize Arecibo's climate.
Weather in Arecibo varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Arecibo, focusing on differences in temperature, rainfall, humidity, and UV levels.
May tends to be warmer than January, with average temperatures reaching up to 26°C (79°F) compared to January's average of 24°C (76°F). The maximum temperatures in May can soar to 32°C (91°F), while January peaks at a more moderate 29°C (84°F). Additionally, May experiences significantly higher precipitation, with 98 mm (3.9 in) over 16 days, compared to January's 41 mm (1.6 in) over just 11 days. Humidity levels are similar in both months, with May at 75% and January at 76%. For more specific details on January weather, you can check Arecibo weather in January.
May generally brings warmer temperatures compared to February, with averages reaching 26°C (79°F) and a maximum of 32°C (91°F) versus February's 24°C (76°F) average and 30°C (86°F) maximum. Additionally, May experiences significantly higher precipitation, totaling 98 mm (3.9 in) over 16 days, while February sees a much lighter rainfall of 47 mm (1.8 in) across 13 days. Despite both months maintaining similar humidity levels at 75%, the weather in May tends to be more humid and wetter than in February. For a closer look at February's weather specifics, visit Arecibo weather in February.
In comparing the weather between March and May, May tends to be warmer, with average temperatures reaching 26°C (79°F) compared to March's average of 24°C (76°F). The maximum temperature in May can soar up to 32°C (91°F), while March peaks at a more comfortable 30°C (86°F). Rainfall is relatively similar, with May receiving 98 mm (3.9 in) of precipitation over 16 days and March slightly lower at 87 mm (3.4 in) also over 16 days. Humidity levels are close, with May at 75% and March at 74%. For those interested in specific weather patterns for March, you can find more details here: Arecibo weather in March.
In comparing the weather between April and May, May tends to be slightly warmer with average temperatures ranging from a minimum of 22°C (73°F) to a maximum of 32°C (91°F), whereas April sees a slightly cooler range of 20°C (69°F) to 30°C (87°F). Additionally, May experiences increased precipitation, totaling 98 mm (3.9 in) over 16 days, compared to April's 79 mm (3.1 in) over 13 days. Despite the rise in temperature and rainfall, both months share a consistent humidity level of 75%. For those interested in more detailed climate information for April, you can check Arecibo weather in April.
In comparing the weather of May and June, we can observe some notable similarities and differences. May typically features a minimum temperature of 22°C (73°F) and an average of 26°C (79°F), while June sees a slightly higher minimum of 23°C (74°F) and a similar average of 27°C (80°F). Both months experience maximum temperatures peaking at 32°C (89°F/91°F), but May has a higher precipitation total of 98 mm (3.9 in) over 16 days compared to June's 90 mm (3.5 in) over 14 days. Additionally, humidity levels are comparable, with May at 75% and June slightly higher at 77%. For more detailed information about June's weather, you can check out Arecibo weather in June.
In May, Arecibo experiences warm temperatures with a minimum of 22°C (73°F) and an average of 26°C (79°F), reaching a maximum of 32°C (91°F). The month is characterized by significant precipitation, totaling 98 mm (3.9 in) over 16 rainy days, and humidity levels averaging 75%. In contrast, July offers slightly warmer nights with a minimum temperature of 24°C (75°F) and an average of 27°C (81°F), while the maximum remains similar at 32°C (90°F). Rainfall in July is slightly reduced, with 91 mm (3.6 in) over the same number of rainy days, and humidity increases to 80%. For more detailed information on July weather, you can refer to Arecibo weather in July.
May and August share similar temperature ranges, with May having a slightly lower minimum and average temperature compared to August. In May, temperatures range from a minimum of 22°C (73°F) to a maximum of 32°C (91°F), while August sees a minimum of 24°C (75°F) and an average of 27°C (81°F). Both months experience considerable humidity, with May at 75% and August slightly higher at 80%. Precipitation is also notable in each month; May receives 98 mm (3.9 in) over 16 days, while August has a bit more with 104 mm (4.1 in) over 19 days. For more detailed information, you can check out Arecibo weather in August.
In comparing the weather of May and September, both months experience warm temperatures with May having a slightly lower average minimum temperature of 22°C (73°F) compared to September's 24°C (75°F). While the maximum temperatures remain similar, with May reaching up to 32°C (91°F) and September capping at 32°C (90°F), September tends to be slightly more humid with an average humidity of 79% versus May’s 75%. December is generally wetter, with September receiving 205 mm (8.1 in) of rainfall over 23 days, in contrast to May's 98 mm (3.9 in) spread over 16 days. For a more detailed look at Arecibo weather in September, you can check out the provided link.
In comparing the weather between May and October, both months feature warm temperatures but with some variations. May sees minimum temperatures around 22°C (73°F), averaging 26°C (79°F) and peaking at 32°C (91°F), while October has slightly higher minimums at 23°C (74°F), an average of 27°C (80°F), and a maximum of 31°C (89°F). Rainfall increases notably in October, with 161 mm (6.4 in) over 23 days compared to May's 98 mm (3.9 in) over 16 days. Additionally, humidity is slightly higher in October at 78%, compared to May's 75%. For more detailed insights, check out Arecibo weather in October.
In comparing the weather of May and November, both months exhibit a similar temperature range, with minimums around 22°C (73°F) and average temperatures of 26°C (79°F). However, November tends to be slightly cooler, with a maximum temperature of 31°C (88°F) compared to May's peak of 32°C (91°F). Precipitation is a notable factor; November experiences more rainfall with 109 mm (4.3 in) over 18 days, while May sees 98 mm (3.9 in) of rain over 16 days. Furthermore, humidity levels are relatively high in both months, but November edges out slightly at 78% compared to May's 75%. For more detailed insights, you can visit Arecibo weather in November.
May and December present a notable contrast in weather, despite their similarities in temperature. May enjoys slightly warmer averages, with temperatures ranging from a minimum of 22°C (73°F) to a maximum of 32°C (91°F), while December sees a minimum of 21°C (71°F) and a maximum of 31°C (88°F). Precipitation is significantly higher in May, with 98 mm (3.9 in) spread over 16 days, compared to December's 45 mm (1.8 in) over just 15 days. Humidity levels are quite comparable, hovering around 75% in May and 76% in December. For further details on the weather in Arecibo during December, you can visit Arecibo weather in December.
As May unfolds in Arecibo, the weather shifts into a vibrant tapestry of warm days and frequent tropical showers. With temperatures peaking around 32°C (91°F), this month stands out as the start of the summer heat, contrasting with the cooler temperatures of earlier months. However, expect a notable increase in humidity, averaging around 75%, which makes the air feel even warmer and brings a refreshing yet moist touch to the atmosphere. The rain, accumulating around 98 mm over 16 days, is a common occurrence, adding to the lush landscapes and vibrant flora. For those seeking a deeper understanding of how Arecibo's climate evolves throughout the year, be sure to check out Arecibo Climate.