Last updated: August 21, 2025
May in Atenas, Costa Rica welcomes a vibrant blend of warm temperatures and lush greenery, as the maximum reaches a pleasant 30°C (86°F) while the average hovers around 24°C (75°F). The month is characterized by a minimum of 19°C (67°F), creating ideal conditions for outdoor adventures. With 412 mm (16.2 in) of rainfall spread across 30 days, humidity levels sit at 69%, painting a refreshing backdrop that nurtures the area's rich biodiversity. Visitors can expect a dynamic environment, perfect for exploring the natural beauty and culture that Atenas has to offer during this lush season.
In Atenas, Costa Rica, May welcomes a subtle shift in temperatures as the region transitions into the rainy season. With minimums averaging 19°C (67°F) and maximums around 30°C (86°F), the days remain pleasantly warm yet slightly more humid than earlier months. The average temperature holds steady at 24°C (75°F), mirroring the comfortable climates of April and June. As nature begins to awaken with verdant foliage and the promise of refreshing rains, visitors can enjoy a beautiful blend of tropical warmth and cooling breezes that make exploration truly delightful.
May marks a dramatic shift in Atenas, Costa Rica's climate, as the region experiences its peak precipitation for the year, accumulating an impressive 412 mm (16.2 in) of rainfall over the entire month. This deluge is not just significant in volume; it also reflects a shift from the preceding drier months, like April with its 118 mm (4.6 in) and March’s 18 mm (0.7 in), to a period of relentless rain. In fact, May witnesses precipitation on every single day, setting the stage for a lush, verdant landscape. As the rainy season sets in, the total number of rain days remains elevated, with both May and June recording 30 days of rainfall, showcasing the consistent and heavy downpours typical of this tropical climate. This trend continues into the following months, highlighting Atenas’ transition into the lush greenness that characterizes the region during the wet season.
In Atenas, Costa Rica, May marks a subtle uptick in humidity, with levels reaching 69%. This slight increase reflects a transition into the more humid months of the year. As the dry season wraps up, humidity begins to rise, paving the way for the lush and vibrant environment characteristic of the region's rainy season. Though May sees a modest rise compared to April's 67%, it serves as a precursor to the more pronounced humidity that follows in June and July, which spike to an average of 84% and 85%, respectively. Residents and visitors alike can expect a more tropical feel as nature bursts into life, signaling the onset of the rainy season and the vibrant flora it nurtures.
In May, Atenas, Costa Rica, continues to experience an extreme UV Index of 14, closely following the peak levels of the previous months, with burn times remaining critically short at just 10 minutes. This trend illustrates the persistent intensity of the sun during the region’s dry season, reinforcing the importance of sun safety measures. As the UV levels remain high into June and July, awareness and precautions should remain top of mind for residents and visitors alike. For more detailed information about UV exposure and safety in Atenas, check out the comprehensive guide at Atenas UV Index.
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In Atenas, Costa Rica, May offers a delightful mix of sunshine, with 235 hours of bright skies, marking a gentle dip from the sun-drenched months of March and April, where hours peaked at 329 and 300, respectively. While this early summer month doesn’t bask in the longest days of the year, it still boasts more sunlight than the approaching rainy months of June and July, which see hours decline to 226 and 209. As nature prepares for the lushness of the rain, the warm May sun provides a pleasant respite, making it an ideal time for outdoor adventures before the rains arrive.
In Atenas, Costa Rica, the likelihood of sunny weather takes a noticeable dip in May, with a mere 17% chance of sunshine. This decline follows a trend from the warmer months, where January's 57% and February's 55% offer the best odds for clear skies. As the region transitions into the rainy season, April already experiences a sharp drop to 24%, and May continues this trend. The months following May, like June and July, see chances of sunshine decrease even further, falling to 15% and 19%, respectively. Thus, if you're seeking sunny days, it’s best to plan your visit to Atenas earlier in the year, as the vibrant sun starts to retreat into the clouds as summer progresses.
In Atenas, Costa Rica, the daylight duration reveals a fascinating rhythm throughout the year. The lengthy days of January and February, with 11 hours of daylight, gradually give way to an increase in light as March and April roll in, where the sun graces the skies for 12 hours. This trend of prolonged daylight continues seamlessly into May, June, and July, ensuring that both locals and visitors can bask in the sun's warm embrace. From mid-summer through September, daylight remains consistent at 12 hours, providing ample opportunity for outdoor adventures. As the year winds down, October to December see a gentle return to 11 hours of daylight, marking a subtle shift back towards shorter days. This natural ebb and flow foster a unique climate, perfect for enjoying all that Atenas has to offer.
In Atenas, Costa Rica, the winds of May bring a gentle breeze with an average speed of 1.3 m/s (3 mph), continuing a subtle decline from the more robust winds of earlier months. January and February kick off the year with slightly stronger winds at 2.0 m/s, while a noticeable dip occurs in April, dropping to 1.5 m/s. As we transition into the dry season, winds remain soft and steady, averaging around 1.1 to 1.3 m/s through the summer months. This tranquil wind pattern not only enhances the serenity of the region but also serves as a gentle reminder of the impending wet season, where breezes begin to pick up again.
Weather in Atenas varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Atenas, focusing on differences in temperature, rainfall, humidity, and UV levels.
In comparing the weather between May and January, May tends to be warmer and considerably wetter. With averages around 24°C (75°F) and maximum temperatures reaching 30°C (86°F), May's climate is characterized by higher humidity at 69% and significant precipitation of 412 mm (16.2 in) spread over 30 days. In contrast, January experiences slightly cooler temperatures, with a minimum of 17°C (63°F) and a maximum of 31°C (87°F), but it is much drier, recording only 28 mm (1.1 in) of rain over just 7 days, maintaining a similar humidity level of 68%. For more details on January’s weather, visit Atenas weather in January.
In comparing the weather between May and February, it's clear that both months offer warm temperatures, albeit with notable differences in precipitation and humidity. February generally experiences slightly cooler minimum temperatures, ranging from 16°C (62°F) to a maximum of 31°C (88°F), and maintains an average of 24°C (76°F). This month is characterized by much lower precipitation, only 13 mm (0.5 in) over 3 days, and a humidity level of 68%. Conversely, May sees temperatures starting from a minimum of 19°C (67°F) and peaking at 30°C (86°F), with an unchanged average of 24°C (75°F). However, May is much wetter, with 412 mm (16.2 in) of precipitation spread across 30 days, resulting in a humidity level of 69%. For more details about February weather in Atenas, check out Atenas weather in February.
When comparing the weather in May and March, we see some notable differences. March features slightly cooler temperatures, with a minimum of 18°C (64°F) and an average of 25°C (77°F), peaking at 32°C (89°F). In contrast, May exhibits higher averages, with a minimum of 19°C (67°F) and an average of 24°C (75°F), reaching a maximum of 30°C (86°F). Another significant difference is the precipitation levels; March is relatively dry, receiving only 18 mm (0.7 in) over just 4 days, while May is much wetter, with 412 mm (16.2 in) of rain spread out over 30 days. Humidity levels are fairly similar, with March at 66% and May at 69%. For a detailed look at March weather, you can explore Atenas weather in March.
In comparing the weather of May and April, both months exhibit quite warm temperatures, with May showcasing a minimum of 19°C (67°F), an average of 24°C (75°F), and a maximum of 30°C (86°F). April, on the other hand, presents slightly lower temperature extremes, with a minimum of 18°C (64°F), an average of 24°C (76°F), and a maximum of 31°C (89°F).
However, May experiences significantly higher precipitation with 412 mm (16.2 in) across 30 days, compared to April's 118 mm (4.6 in) over 24 days. Humidity levels are similar, with May at 69% and April at 67%. For a closer look at April's weather specifics, visit Atenas weather in April.
May and June share similar temperature profiles, with both months featuring a minimum temperature of 19°C (67°F), an average of 24°C (75°F), and a maximum of 30°C (86°F). However, June experiences slightly less precipitation than May, receiving 397 mm (15.6 in) compared to May’s 412 mm (16.2 in), despite both months having rain on 30 days. Notably, humidity levels rise in June to 84%, up from 69% in May, creating a more humid atmosphere. For further details on the weather specific to June, check out Atenas weather in June.
In May, the weather features a range of temperatures with a minimum of 19°C (67°F) and an average of 24°C (75°F), peaking at a maximum of 30°C (86°F). However, this month is marked by significant precipitation, totaling 412 mm (16.2 in) over 30 days, accompanied by a humidity level of 69%.
In contrast, July experiences slightly cooler temperatures, with a minimum of 19°C (67°F), an average of 24°C (75°F), and a maximum of 29°C (85°F). Rainfall is notably less in July, with precipitation amounting to 296 mm (11.7 in) over the same 30 days, but the humidity rises to 85%.
For more specific insights on July weather, you can refer to Atenas weather in July.
In comparing the weather between May and August, we observe some notable similarities and differences. Both months experience a minimum temperature around 19°C (66-67°F) and a maximum of 30°C (85-86°F), keeping daytime highs fairly consistent. However, May has a slightly warmer average temperature of 24°C (75°F) compared to August's 23°C (74°F).
Precipitation levels are also quite close, with May receiving 412 mm (16.2 in) and August slightly lower at 393 mm (15.5 in). Interestingly, both months experience rain on an average of 30 days, but August tends to have higher humidity at 82% versus May's 69%. For more detailed insights, you can check Atenas weather in August.
In comparing May and September weather, both months experience relatively warm temperatures, with May having slightly higher averages at a minimum of 19°C (67°F) and an average of 24°C (75°F), compared to September's minimum of 18°C (66°F) and an average of 23°C (74°F). However, September tends to be more humid, with humidity levels reaching 81%, compared to May's 69%. Precipitation is also notably higher in September, with 461 mm (18.2 in) falling over 29 days, compared to May's 412 mm (16.2 in) over 30 days. For more details about the weather during this time, you can visit Atenas weather in September.
In May, temperatures in Atenas range from a minimum of 19°C (67°F) to a maximum of 30°C (86°F), with an average of 24°C (75°F). The month experiences significant rainfall, totaling 412 mm (16.2 in) over 30 days, accompanied by a humidity level of 69%. In contrast, October weather features slightly cooler temperatures with a minimum of 18°C (66°F) and a maximum of 29°C (84°F), averaging 23°C (73°F). However, October is notably wetter, with precipitation reaching 639 mm (25.2 in), while humidity rises to 80%. For more detailed insights, you can check this link: Atenas weather in October.
May and November present distinct weather patterns. In May, temperatures range from a minimum of 19°C (67°F) to a maximum of 30°C (86°F), with an average temperature of 24°C (75°F). This month sees significant rainfall, totaling 412 mm (16.2 in) over 30 days and a humidity level of 69%. In contrast, November features slightly cooler temperatures with a minimum of 18°C (64°F) and a maximum of 29°C (85°F), while the average hovers around 23°C (74°F). Precipitation in November is notably less, at 251 mm (9.9 in) over 28 days, but the humidity rises to 80%. For more detailed insights into November weather, visit Atenas weather in November.
In May, temperatures are generally warmer with a minimum of 19°C (67°F), an average of 24°C (75°F), and reaching up to 30°C (86°F). However, this month experiences significant rainfall, totaling 412 mm (16.2 in) over about 30 days, contributing to a humidity level of 69%. In contrast, December presents a slightly cooler environment with temperatures ranging from a minimum of 18°C (65°F) to a maximum of 30°C (86°F) and a lower average of 23°C (74°F). Precipitation drops significantly in December to 72 mm (2.8 in) over 18 days, and the humidity increases slightly to 72%. For more details on weather conditions in December, you can check Atenas weather in December.
As May unfolds in Atenas, the weather transforms into a vibrant tapestry of warmth and humidity, marking a distinct shift from the more temperate months that precede it. With average temperatures reaching a comfortable 24°C, this month welcomes the onset of the wet season, bringing with it increased precipitation—often drenching the landscapes in lush green hues, albeit on nearly every day of the month. The 69% humidity adds to the tropical feel, providing a refreshing contrast to the drier periods earlier in the year. For those seeking to explore the beauty of Atenas in May, it’s a time of blossoming flora and rejuvenating rains, perfect for immersing oneself in the region's natural splendor. Discover more about the climate of this stunning area at Atenas Climate.