Last updated: August 27, 2025
Experience the mesmerizing May weather of Arenal, Peru, where temperatures typically peak at a warm 32°C (91°F) and average a comfortable 23°C (74°F). The month sees a pleasant minimum of 16°C (62°F), inviting outdoor adventures amidst lush landscapes. While May brings only 6 mm (0.2 in) of rain over 2 days, the high humidity level of 89% creates a vibrant, tropical atmosphere. Ideal for exploring the natural beauty of the region, May provides a perfect blend of warmth and refreshing humidity, making it an enchanting time to discover Arenal's wonders.
In May, Arenal, Peru, experiences a transition towards cooler temperatures, with minimums dipping to a pleasant 16°C (62°F) and averages settling at a comfortable 23°C (74°F). The maximums reach a mild 32°C (91°F), providing a warm but not overwhelming climate ideal for outdoor activities. Compared to earlier months, May's temperatures indicate a slight decline, reflecting the region's gradual shift from the hotter, humid early-year climate into cooler, drier days. This trend marks May as a great time for exploring Arenal’s lush natural beauty, as the weather remains inviting while avoiding the heat peaks of previous months.
In Arenal, Peru, May marks a notable dip in precipitation, with only 6 mm (0.2 in) recorded across just 2 days. This trend continues a pattern established earlier in the year, where March witnessed the highest rainfall of 93 mm (3.7 in), followed by a sharp decline in April and further into May. As the dry season approaches, May's light showers signal a transition towards even drier months like June and July, which record minimal precipitation. This gradual reduction not only reflects the changing seasons but also highlights Arenal's remarkable climate variability, where lush landscapes give way to more arid conditions as the year unfolds.
In Arenal, Peru, May experiences a humidity level of 89%, maintaining the trend of high humidity seen in the earlier months of the year. After slightly declining from January through April, where humidity levels hovered around 86-89%, May sees a return to that peak level. This persistent humidity is typical for the region, as it prepares for the transition into the drier months of June and July, which drop to 84% and 71%, respectively. Such fluctuations not only contribute to the lush rainforest environment that Arenal is famous for but also signal the onset of seasonal changes, making May a fascinating time for visitors who enjoy the vibrant, humid climate.
In May, Arenal experiences a UV Index of 13, maintaining its status in the extreme exposure category, with a burn time of just 10 minutes. This month marks a slight decrease from the peak UV Index of 16 seen in March, yet the intensity remains high, reflecting a consistent trend of extreme sunlight exposure from January through May. Travelers should remain vigilant and take protective measures against UV radiation, especially as daylight hours increase leading into the dry season. For more detailed information about UV levels in Arenal throughout the year, check Arenal UV Index.
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In Arenal, Peru, May marks a delightful peak in sunshine, with an impressive 334 hours of glorious sunlight, showcasing a steady ascent from January’s 275 hours to April’s 324 hours. This upward trend hits its zenith in May, emphasizing the region's allure during late autumn, where the days grow longer and brighter. Following May, the sunshine begins to slightly recede, yet remains generous throughout the subsequent months, with June to August still offering over 300 hours of radiant warmth. This pattern not only highlights the inviting climate but also beckons outdoor enthusiasts to experience Arenal's breathtaking landscapes while basking in the sun.
May in Arenal, Peru, boasts a promising likelihood of sunny weather, with a notable 63% chance of sunshine that month. This marks a significant increase compared to the preceding months, such as April's 39% and March's 28%. As spring transitions towards summer, Arenal emerges as a vibrant and inviting destination, where the blend of warmth and sunshine creates ideal conditions for adventure and exploration. Interestingly, this peak in sunny days contrasts with the cooler, cloudier months like January and February, which only offer a modest 31% chance of sun. After May, the likelihood dips slightly during June but remains higher than earlier in the year, making May an optimal time to revel in Arenal’s breathtaking landscapes under clear skies.
In Arenal, Peru, daylight duration remains relatively consistent throughout the year, offering a remarkable blend of light and shadow. From January to March, the days stretch to a generous 12 hours, creating a perfect backdrop for outdoor adventures. As spring approaches, April marks a subtle shift, with daylight dipping to 11 hours, a change that continues through the dry season until August. This steady reduction highlights the region's transition into the colder months. Interestingly, as the year concludes, daylight perks back up in September, returning to 12 hours by October and maintaining that duration through December. This cyclical pattern not only enhances the daily rhythms of life in Arenal but also enriches the vibrant ecosystem that thrives under varying lengths of daylight.
In May, the winds in Arenal, Peru begin to pick up slightly, reaching an average speed of 3.6 m/s (8 mph). This steady increase sets the stage for the months ahead, as June and July maintain similar speeds of 3.7 m/s (8 mph) and 3.6 m/s (8 mph), respectively. Overall, from January to May, there's a notable upward trend in wind speeds, highlighting a gradual shift from the calmer breezes of early winter towards the more robust gusts typical of the summer months. As spring transitions toward summer, the winds continue to gain strength, peaking at 4.0 m/s (9 mph) by October, creating an exhilarating atmosphere ideal for outdoor activities and fostering a vibrant energy throughout the region.
Weather in Arenal varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Arenal, focusing on differences in temperature, rainfall, humidity, and UV levels.
May and January both present warm and humid weather, but with some notable differences. In May, temperatures range from a minimum of 16°C (62°F) to a maximum of 32°C (91°F), averaging around 23°C (74°F), while January boasts slightly higher temperatures, with a minimum of 19°C (66°F) and a maximum of 34°C (94°F), averaging 25°C (78°F). Rainfall is more modest in May, with only 6 mm (0.2 in) over 2 days compared to January's 10 mm (0.4 in) over 3 days. Despite the slight variation in precipitation, both months maintain a high humidity level of 89%. For more detailed insights into January's weather, you can explore Arenal weather in January.
Comparing the weather in May and February reveals some interesting contrasts. In May, temperatures are milder, with a minimum of 16°C (62°F) and a maximum of 32°C (91°F), while February tends to be warmer, with temperatures ranging from a minimum of 20°C (68°F) to a maximum of 34°C (94°F). February also experiences significantly higher precipitation, receiving 42 mm (1.7 in) over approximately 6 days, compared to just 6 mm (0.2 in) over 2 days in May. Humidity levels are similar, hovering around 89% in May and 87% in February. For more detailed information about February weather, you can refer to Arenal weather in February.
In comparing the weather of March and May, we see notable differences. March experiences higher minimum and average temperatures, with a minimum of 21°C (69°F) and an average of 27°C (80°F), reaching up to a hot maximum of 35°C (95°F). In contrast, May offers a cooler climate, with temperatures starting at a minimum of 16°C (62°F) and averaging 23°C (74°F), peaking at 32°C (91°F).
Precipitation patterns also differ significantly; March has a substantial amount of rainfall at 93 mm (3.7 in) spread over 8 days, while May is much drier, receiving only 6 mm (0.2 in) of rain across just 2 days. Humidity levels are relatively similar, with March at 87% and May slightly higher at 89%. For further details on March weather specifics, you can visit Arenal weather in March.
When comparing the weather in May and April, we observe some notable differences. In April, temperatures are slightly higher, with a minimum of 18°C (65°F), an average of 25°C (78°F), and a maximum of 34°C (94°F), alongside more significant rainfall at 19 mm (0.8 in) across 2 days. Humidity levels are quite similar, with April at 86% and May at 89%. In contrast, May experiences milder temperatures, with a minimum of 16°C (62°F), an average of 23°C (74°F), and a maximum of 32°C (91°F), coupled with much less precipitation at only 6 mm (0.2 in). This makes May a drier and slightly cooler month overall. For more details about April weather, check out Arenal weather in April.
In May, the weather presents a warm and humid atmosphere, with temperatures ranging from a minimum of 16°C (62°F) to a maximum of 32°C (91°F) and an average temperature of 23°C (74°F). The month sees a total precipitation of 6 mm (0.2 in) over approximately 2 days, resulting in a humidity level of 89%. In contrast, June experiences slightly cooler temperatures, with a minimum of 17°C (63°F) and a maximum of 31°C (87°F), averaging 22°C (71°F). Additionally, June is characterized by significantly lower precipitation, only 2 mm (0.1 in), and no rainy days, contributing to a more pleasant humidity level of 84%. For more specific details about June weather in a different location, visit Arenal weather in June.
In May, the weather is characterized by warmer temperatures, with an average of 23°C (74°F) and a maximum of 32°C (91°F), along with a higher humidity level of 89%. This month typically experiences light precipitation, averaging 6 mm (0.2 in) over just 2 days. In contrast, July presents a cooler climate with an average temperature of 20°C (69°F) and a maximum of 27°C (82°F). This month enjoys a drier spell with minimal precipitation of just 1 mm (0.1 in) and no rainy days, accompanied by lower humidity at 71%. For more about the specific weather conditions in July, you can visit Arenal weather in July.
In May, the weather tends to be warmer with temperatures ranging from a minimum of 16°C (62°F) to a maximum of 32°C (91°F), averaging around 23°C (74°F). The month experiences some precipitation, with about 6 mm (0.2 in) of rain over just 2 days, and humidity levels are relatively high at 89%.
In contrast, August is noticeably cooler, with temperatures ranging from a minimum of 15°C (59°F) to a maximum of 27°C (82°F) and an average of 20°C (68°F). This month is characterized by very little rainfall, with only 1 mm (0.0 in) and no rain days, leading to lower humidity levels of 71%. For more detailed information, check out Arenal weather in August.
May and September present contrasting weather patterns. In May, temperatures range from a minimum of 16°C (62°F) to a maximum of 32°C (91°F), with an average of 23°C (74°F). This month is characterized by higher humidity at 89% and some rainfall, totaling 6 mm (0.2 in) over two days. In contrast, September sees milder temperatures, with a minimum of 15°C (60°F), an average of 20°C (69°F), and a maximum of 28°C (83°F). Rainfall is almost non-existent in September, accumulating only 1 mm (0.1 in) with no rainy days, and the humidity drops to a more comfortable 75%. For more details, check out Arenal weather in September.
In May, temperatures in the region range from a minimum of 16°C (62°F) to a maximum of 32°C (91°F), with an average of 23°C (74°F). This month experiences a higher level of humidity at 89%, alongside some precipitation, totaling 6 mm (0.2 in) over 2 days. In contrast, October offers slightly cooler temperatures, with a minimum of 16°C (61°F), an average of 21°C (70°F), and a maximum of 29°C (85°F). The humidity decreases to 77%, and October features minimal precipitation of just 4 mm (0.1 in) over 0 days. For more detailed climate information, you can check out Arenal weather in October.
May and November both offer warm temperatures, but May tends to be slightly hotter and more humid. In May, temperatures range from a minimum of 16°C (62°F) to a maximum of 32°C (91°F), with an average of 23°C (74°F) and humidity levels at a high 89%. In comparison, November sees a more moderate temperature range, with minimums around 15°C (59°F) and maximums peaking at 30°C (86°F), averaging 21°C (70°F) and enjoying lower humidity at 79%. Both months have minimal precipitation, but November typically experiences just one rainy day compared to May's two. For more details on November weather, you can refer to Arenal weather in November.
The weather in May and December exhibits some notable similarities and differences. In both months, the average temperature remains a consistent 23°C (74°F), but May experiences slightly higher maximum temperatures, reaching 32°C (91°F) compared to December’s peak of 32°C (89°F). Additionally, December sees a rise in precipitation, with 16 mm (0.6 in) of rain over three days, whereas May has only 6 mm (0.2 in) over two days, making it the drier month. Humidity levels are also quite close, with May at 89% and December slightly lower at 86%. For more specifics on December weather, you can check Arenal weather in December.
May in Arenal offers a gentle transition into the dry season, characterized by moderate temperatures and surprisingly low precipitation. Compared to the wetter months that precede it, May experiences a significant drop in rainfall, with just a couple of showers, making it an ideal time for outdoor activities. The humidity remains high, yet the warmth of the days invites exploration amid lush landscapes. As you plan your visit, it's a perfect blend of comfort and adventure. For a deeper dive into the seasonal patterns, check out Arenal Climate.