Last updated: August 21, 2025
Experience the vibrant May weather in Santa Ana, Costa Rica, where temperatures fluctuate between a pleasant 16°C (61°F) and a comfortable 28°C (83°F), averaging around 21°C (70°F). This month is characterized by significant humidity levels at 69%, creating a lush, tropical atmosphere. However, prepare for an abundant 391 mm (15.4 in) of rainfall over approximately 27 days, which brings the landscape to life and enhances the region's natural beauty. May offers a unique blend of warmth and moisture, making it a captivating time to explore the rich flora and fauna of this stunning destination.
May in Santa Ana, Costa Rica marks the transition into warmer, slightly more humid weather as the rainy season approaches. The temperatures during this month range from a comfortable 16°C (61°F) at night to a pleasant 28°C (83°F) during the day, maintaining an average of 21°C (70°F). Compared to the preceding months, May shows a gradual warming trend with nighttime temperatures rising slightly, and daytime highs remaining stable. While the warmth is inviting, it also signals the start of increased rainfall, providing a refreshing contrast to the sunny days of earlier months. As nature awakens, visitors can enjoy the lush landscapes against a backdrop of idyllic temperatures.
In May, Santa Ana experiences a dramatic shift in weather patterns, with precipitation soaring to 391 mm (15.4 in) over an impressive 27 rainy days. This spike marks a significant increase compared to the preceding months, where averages hovered around the low 30s mm for January through April. The lush landscapes come alive during this month, as the heavy rains signal the height of the rainy season, setting the stage for vibrant greenery that characterizes the region. Following May, June continues this trend, though with slightly less rain, showcasing the consistent, tropical downpours typical of this time of year. As summer unfolds, the impact of May’s rainfall can be seen in the lush, thriving flora, emphasizing the importance of this month in shaping Santa Ana's natural beauty.
As May arrives in Santa Ana, Costa Rica, the humidity sees a slight uptick to 69%, marking a transition into the wetter months. This increase follows a relatively stable trend earlier in the year, with humidity hovering around the 68% mark from January through February. As spring gives way to summer, the rise in humidity signals the onset of the rainy season, which continues to escalate dramatically in June and July, when levels soar to 84% and 85%, respectively. This gradual climb from early spring to mid-year highlights the region's characteristic humid climate, making May a precursor to the lush, verdant landscapes that define the heart of Costa Rica's rainy season.
In May, residents and visitors of Santa Ana, Costa Rica should be prepared for another month of intense sun exposure, with a UV Index of 14 categorizing it as extreme. This follows closely from the peak months of March and April, which both recorded a UV Index of 15. It is crucial to note that regardless of the month's slight variation, the burn time remains a quick 10 minutes, highlighting the relentless power of the sun in this region. As the year progresses, June and July maintain the same high UV levels, underscoring a consistent trend of extreme sun exposure during this season. For those planning outdoor activities, understanding these UV levels is essential; you can find further details at Santa Ana UV Index.
UV Risk Categories
In Santa Ana, Costa Rica, May brings a delightful transition, with 235 hours of sunshine that signifies the shift from the peak dryness of earlier months to the onset of the rainy season. Though May's sunshine dips slightly from the bright days of March, which boasts 329 hours, it still holds its own compared to the typically cloudier June and July, which register 226 and 209 hours, respectively. This month serves as a gentle reminder of the bountiful sun that blesses the region earlier in the year. While daylight decreases as the year progresses, with August through October remaining shy of the earlier months, the consistent averages of around 230 hours of sunshine reinforce Santa Ana’s charm, making it a vibrant destination even as the rains begin to patter.
In Santa Ana, Costa Rica, the likelihood of sunny weather takes a noticeable dip as May approaches, with chances plummeting to 14%—a sharp decline from earlier months. Following a relatively dry April at 20%, the clouds seem to settle in for the rainy season that begins in earnest as June follows. This trend suggests that travelers seeking reliable sunshine should plan their trips earlier in the year, given that January boasts a sunny chance of 52%, yet the onset of months like June and July presents only a 17% and 14% likelihood, respectively. Overall, visitors in May should be prepared for more unpredictable weather as they enjoy the lush scenery the rain brings to this vibrant region.
In Santa Ana, Costa Rica, May brings a delightful consistency in daylight, with the sun gracing the skies for a wholesome 12 hours each day. This trend of extended daylight, which began in March, continues into May and seamlessly transitions into June, offering a perfect backdrop for outdoor activities and exploration. Throughout the mid-year months, from March to August, the generous hours of daylight help foster vibrant life around the region, allowing locals and visitors alike to make the most of their time in this tropical paradise. As the year progresses towards October, the daylight gradually diminishes back to 11 hours, but the warmth and brightness of May remain a cherished highlight in Santa Ana’s captivating climate.
In Santa Ana, Costa Rica, May marks a notable shift in wind patterns, with average wind speeds dipping to 1.5 m/s (3 mph)—the lowest of the year. As the dry season gives way to the lush green of the rainy season, the winds become gentler, reflecting a calm that envelops the region. This trend of diminishing wind speed continues into June, where it reaches 1.2 m/s (3 mph), indicating a further serenade of softness in the air. However, the breezy months preceding May, such as January through April, showcase stronger winds ranging from 1.7 m/s to 2.4 m/s (4 to 5 mph), which create a lively atmosphere, perfect for outdoor activities. As summer approaches, residents and visitors alike can relish the slower pace and tranquil vibes that May brings, suggesting a blissful pause before the seasonal shifts gradually resume.
Weather in Santa Ana varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Santa Ana, focusing on differences in temperature, rainfall, humidity, and UV levels.
May and January exhibit distinct weather patterns, highlighting the transition between dry and wet seasons. In May, temperatures range from a minimum of 16°C (61°F) to a maximum of 28°C (83°F), with an average of 21°C (70°F). However, it is also a notably wetter month, receiving 391 mm (15.4 in) of precipitation over 27 days, contributing to a humidity level of 69%. In contrast, January experiences milder temperatures, ranging from 13°C (56°F) to 27°C (82°F) with an average of 20°C (68°F). This month is significantly drier, with only 32 mm (1.3 in) of precipitation spread over just 6 days, maintaining a similar humidity level of 68%. For a more detailed insight into the January climate, you can check Santa Ana weather in January.
When comparing the weather in May and February, several distinct differences emerge. May tends to be warmer overall, with average temperatures reaching 21°C (70°F) compared to February's average of 20°C (69°F). Additionally, May experiences significantly higher precipitation, totaling 391 mm (15.4 in) over 27 days, whereas February sees much less rainfall at just 13 mm (0.5 in) for only 3 days. Both months share a similar maximum temperature of 28°C (83°F), but May's increased humidity of 69% compared to February's 68% contributes to a more humid environment. For a detailed look at February weather, check out Santa Ana weather in February.
In comparing the weather of May and March, both months exhibit similar average temperatures, ranging from a minimum of 14-16°C (57-61°F) to a maximum of 28°C (83°F). However, May is significantly wetter, with a notable precipitation of 391 mm (15.4 in) occurring over 27 days, compared to March's mere 15 mm (0.6 in) over just 4 days. The humidity levels are also slightly higher in May at 69% compared to 66% in March, indicating a more humid atmosphere during the later month. For more detailed insights on March weather, you can check out Santa Ana weather in March.
In comparing the weather of April and May, April experiences slightly cooler temperatures, with a minimum of 15°C (58°F) and a maximum of 29°C (85°F), while May sees a minimum of 16°C (61°F) and a maximum of 28°C (83°F). Although both months have the same average temperature of 21°C (70°F), May is significantly wetter, receiving 391 mm (15.4 in) of precipitation over 27 days, in stark contrast to April's 79 mm (3.1 in) across just 16 days. The humidity levels are also comparable, with April at 67% and May increasing slightly to 69%. For more detailed information on how April's weather unfolds, you can visit Santa Ana weather in April.
In comparing the weather between May and June, we see that both months have very similar average temperatures, with May averaging 21°C (70°F) and June also maintaining the same average. However, June experiences slightly cooler maximum temperatures of 27°C (81°F), compared to May's peak of 28°C (83°F). Precipitation patterns show a notable difference, as May records more rainfall at 391 mm (15.4 in) over 27 days, while June sees a decrease to 351 mm (13.8 in) with the same number of rainy days. Additionally, humidity levels are higher in June at 84%, compared to May's 69%. For more detailed information on the weather in June, you can visit Santa Ana weather in June.
In comparing the weather between May and July, both months exhibit similar minimum temperatures, remaining at a comfortable 16°C (61°F). However, May tends to be warmer overall, with average temperatures reaching 21°C (70°F) and maximums of 28°C (83°F). In contrast, July has a slightly cooler average temperature of 21°C (69°F) and a maximum of 27°C (81°F). May is characterized by significantly higher precipitation, with 391 mm (15.4 in) spread over 27 days, compared to July's 233 mm (9.2 in) over 26 days. Humidity levels also rise in July, reaching 85%, compared to May's 69%, making July feel more humid. For more insights into July's weather, check out Santa Ana weather in July.
When comparing the weather in May and August, we can observe some notable similarities and differences. Both months feature a minimum temperature of around 16°C (61°F) and a maximum of 28°C (82-83°F), but May tends to be slightly warmer on average with temperatures reaching up to 21°C (70°F), compared to August’s average of 20°C (69°F). May also experiences more precipitation, totaling 391 mm (15.4 in) over 27 days, while August sees a little less rain at 331 mm (13.0 in) across 26 days. Additionally, humidity is higher in August at 82%, compared to May's 69%, making August feel more humid. For a closer look at the weather specifics for August, you can check out Santa Ana weather in August.
When comparing the weather in May and September, we notice some distinct similarities and differences. Both months experience a mild range of temperatures, with May having slightly warmer averages—ranging from a minimum of 16°C (61°F) to a maximum of 28°C (83°F), compared to September's minimum of 15°C (60°F) and maximum of 27°C (80°F). However, September tends to be a bit more humid, with a humidity level of 81% versus May's 69%. Precipitation is also more pronounced in September, totaling 436 mm (17.2 in) over 28 days, as opposed to May's 391 mm (15.4 in) spread over 27 days. For those interested in more specific weather details, you can check Santa Ana weather in September.
May and October present notable differences in weather patterns. In May, temperatures range from a minimum of 16°C (61°F) to a maximum of 28°C (83°F), with an average of 21°C (70°F). This month is characterized by significant rainfall, totaling 391 mm (15.4 in) over 27 days, and a relative humidity of 69%. In contrast, October sees slightly cooler temperatures, with a minimum of 15°C (60°F), averaging around 20°C (68°F) and reaching a maximum of 27°C (80°F). However, October is much wetter, experiencing 570 mm (22.4 in) of precipitation over 29 days and a higher humidity level of 80%. For more details on October weather, check Santa Ana weather in October.
May and November present distinct weather patterns, with May generally experiencing warmer temperatures. In May, the minimum temperature is around 16°C (61°F), reaching an average of 21°C (70°F) and peaking at 28°C (83°F). In contrast, November sees slightly cooler temperatures, with a minimum of 15°C (59°F), an average of 20°C (68°F), and a maximum of 26°C (79°F). While both months are characterized by high humidity—69% in May and 80% in November—May faces significantly more rainfall, totaling 391 mm (15.4 inches) over 27 days, compared to November's 209 mm (8.2 inches) over 19 days. For more detailed insights about November weather, you can refer to Santa Ana weather in November.
In May, the weather tends to be warmer and wetter compared to December, with average temperatures ranging from 16°C (61°F) to 28°C (83°F) and significant precipitation of 391 mm (15.4 in) spread over 27 days. The humidity level sits at a comfortable 69%. In contrast, December brings milder temperatures, with a minimum of 15°C (58°F) and a maximum of 26°C (80°F), along with much lower precipitation of 63 mm (2.5 in) across just 11 days and a slight increase in humidity at 72%. For more details, check out Santa Ana weather in December.
As May rolls in, Santa Ana experiences a distinctive shift in its weather dynamics compared to the earlier months of the year. This period is characterized by warmer temperatures, with the average hovering around a comfortable 21°C (70°F), while also introducing an increased level of humidity that can feel quite lush. Unlike the drier months that precede it, May sees a notable uptick in precipitation, with frequent rains contributing to a total of around 391 mm (15.4 in) over 27 days. This combination of warmth and moisture nurtures the vibrant landscapes that define the region. For a detailed look at how the climate evolves throughout the year, visit Santa Ana Climate.