Last updated: August 21, 2025
May in Jaco, Costa Rica is marked by a tropical climate, where temperatures peak at a warm 29°C (84°F) and typically settle around an average of 27°C (81°F). With a minimum temperature of 25°C (77°F), the weather remains pleasantly warm throughout the month. However, visitors should prepare for substantial moisture, as May sees 474 mm (18.7 in) of rain spread over 30 days, contributing to a humidity level of 69%. This lush, vibrant atmosphere makes it an ideal time to experience the rich natural beauty of Jaco, though adventurers should not forget their rain gear.
In May, Jaco, Costa Rica, offers a captivating tropical experience, with temperatures remaining consistently warm. The minimum temperature hovers around a comfortable 25°C (77°F), while the average dips slightly to 27°C (81°F). Although the maximum temperature reaches 29°C (84°F), the overall warmth creates an inviting atmosphere, perfect for beach activities or exploring the lush surroundings. This month marks the transition into the rainy season, but the temperatures continue to reflect stability and reliability. Overall, May's weather sets the stage for vibrant adventures amidst the stunning natural beauty of Jaco.
May marks a significant turning point in Jaco, Costa Rica, as it experiences a dramatic surge in precipitation, amassing a staggering 474 mm (18.7 in) over the course of the month. This deluge occurs on every single day, contributing to a total of 30 rain-soaked days, emphasizing May's status as the wettest month of the year. Following the comparatively dry April, with only 130 mm (5.1 in) of rain over 21 days, the shift to May indicates a clear transition into the rainy season, which continues through the summer months. Notably, Jaco experiences consistently high rainfall through August, with May’s abundant rains setting the stage for the lush landscapes that define this tropical paradise. As the region prepares for the intensity of the rainy season, May serves as a reminder of nature’s powerful rhythms and the vital role of precipitation in sustaining the vibrant ecosystem of this coastal haven.
In May, Jaco, Costa Rica, experiences a slight uptick in humidity, reaching 69%. This marks an increase from the previous months, particularly from the moderate 66% in March and 67% in April. As the region transitions into the wetter season, humidity levels begin to rise more noticeably, setting the stage for the significantly higher humidity levels that follow in June and July, which soar to 84% and 85%, respectively. This gradual increase reflects the lush environment of Jaco, where the vibrant flora thrives thanks to the consistent moisture in the air, making May a delightful blend of warmth and humidity for visitors and locals alike.
In May, Jaco, Costa Rica experiences a UV Index of 14, categorizing the exposure as extreme with a remarkably swift burn time of just 10 minutes. This trend of heightened UV levels continues from April, maintaining the intensity seen throughout the early months of the year. With consistently high UV Index readings ranging from 11 to 14 from January to June, it's clear that sun safety is paramount in Jaco. Visitors and locals alike should prepare for these intense conditions by seeking shade, wearing protective clothing, and applying sunscreen regularly. For more detailed information on UV levels throughout the year, check out Jaco UV Index.
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In May, Jaco, Costa Rica experiences a mild dip in sunshine hours, tallying up to 258 hours, just slightly below April’s robust 310 hours. This month serves as a transition as the vibrant sun of earlier spring wanes into the early hints of summer. While January to April brims with sun-kissed days, May’s slightly reduced sunshine continues to sustain the lush beauty of the region, preparing for the warmer, sunnier months ahead. The trend reveals an interesting ebb and flow, where after May, the sunshine hours stabilize around 260 hours through June before dipping further in the heart of the rainy season. Overall, Jaco delights visitors in May with a blend of warmth and occasional refreshing showers, making it a lovely prelude to the vibrant summer ahead.
As May approaches in Jaco, Costa Rica, the likelihood of sunny weather takes a noticeable dip, with only a 17% chance of basking in the sun. This marks a significant decrease from the more promising months of January through March, where sunny conditions hover around 54% to 58%. April already hinted at the shift with a 25% chance, but May signals the onset of the rainy season, followed closely by June and July, which maintain similarly low probabilities of sunshine. The pattern suggests that while Jaco enjoys ample sunlight earlier in the year, May tends to be a transitional month, paving the way for the lush greenery that follows with the rains.
In Jaco, Costa Rica, daylight duration offers a captivating glimpse into the rhythm of the seasons. Starting the year with a consistent 11 hours of daylight in January and February, the days gradually stretch as spring approaches. By March, daylight extends to 12 hours, a trend that continues through the vibrant months of April and May. This pattern of ample sunlight persists from May through August, allowing for extended outdoor activities and enjoyment of the stunning beaches. As September arrives, the daylight remains steady, before a gentle tapering begins in October, settling back to 11 hours by November and December. This rhythmic ebb and flow of daylight illuminates Jaco’s charm, inviting visitors to experience its beauty year-round.
As May unfolds in Jaco, Costa Rica, the coastal breezes embrace the town with an average wind speed of 2.7 m/s (6 mph), mirroring the gentle currents of the preceding months. This consistency in wind patterns highlights a harmonious transition towards slightly breezier summer months, hinting at the 3.2 m/s (7 mph) winds that await in August. With May's balmy atmosphere and reliable winds, those seeking adventure—be it surfing or paragliding—find an ideal setting to enjoy the stunning coastline. Overall, this month serves as a delightful bridge, maintaining the charm of early spring while paving the way for the invigorating summer breezes just around the corner.
Weather in Jaco varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Jaco, focusing on differences in temperature, rainfall, humidity, and UV levels.
In comparing the weather between January and May, both months feature similar temperature ranges, with minimums of 25°C (77°F) and averages around 27°C (81°F). However, May experiences significantly heavier rainfall, with 474 mm (18.7 in) of precipitation over 30 days, compared to only 36 mm (1.4 in) over 7 days in January. The humidity levels are relatively consistent, with May at 69% and January slightly lower at 68%. This stark contrast in precipitation makes January a drier month, making it a more favorable time for outdoor activities. For more detailed information on Jaco's climate, check out Jaco weather in January.
When comparing the weather in May and February, both months share similar temperature ranges, with minimums around 25°C (77°F), average temperatures at 27°C (81°F), and maximums reaching up to 29°C (84-85°F). However, May is notably wetter, receiving 474 mm (18.7 in) of precipitation over 30 days, while February sees a mere 12 mm (0.5 in) across just 3 days of rain. The humidity levels are also comparable, with May at 69% and February slightly lower at 68%. For detailed insights on February weather, you can check Jaco weather in February.
In March, the weather is generally more favorable with slightly higher average temperatures, reaching an average of 28°C (82°F) and a maximum of 29°C (85°F). The humidity is relatively lower at 66%, and the month experiences minimal precipitation, with only 13 mm (0.5 in) falling over just 3 days. In contrast, May is significantly wetter, receiving a substantial 474 mm (18.7 in) of rain spread across 30 days, while average temperatures remain warm at 27°C (81°F). The humidity levels peak at 69%, creating a distinctly humid environment. For more detailed information regarding March weather, you can visit Jaco weather in March.
In comparing the weather of April and May, both months feature similar temperature ranges, with a minimum of 25°C (77°F) and an average of 27°C (81°F). However, May experiences significantly higher precipitation, amounting to 474 mm (18.7 in) over 30 days, compared to April’s 130 mm (5.1 in) over 21 days. This increase in rainfall also correlates with slightly higher humidity levels in May at 69%, compared to April's 67%. For more detailed insights into April weather, you can visit Jaco weather in April.
In comparing the weather between May and June, we find that both months have similar temperature ranges, with minimums at 25°C (77°F), averages around 27°C (81°F), and maximums hitting 29°C (84°F). However, June experiences slightly lower precipitation, totaling 393 mm (15.5 in) over 29 days, compared to May’s heavier rainfall of 474 mm (18.7 in) across 30 days. Additionally, June is characterized by higher humidity levels at 84%, compared to May’s 69%. For a detailed look at June weather specifically in Jaco, check out this link: Jaco weather in June.
In both May and July, temperatures remain quite stable, with minimums around 25°C (77°F) and maximums reaching up to 29°C (84°F). However, May experiences significantly higher rainfall, averaging 474 mm (18.7 in) compared to July's 358 mm (14.1 in), making July the drier month of the two. Additionally, July's humidity is higher at 85%, compared to May's 69%, contributing to a more muggy atmosphere. For specific details about July weather, you can visit Jaco weather in July.
May and August share similar temperature ranges, with both months having a minimum temperature of 25°C (77°F) and an average around 27°C (81°F). However, while May typically experiences a maximum of 29°C (84°F), August's maximum slightly decreases to 28°C (83°F). Precipitation patterns also vary, as May records 474 mm (18.7 in) over 30 days, while August sees an increase to 495 mm (19.5 in), accompanied by higher humidity levels of 82% compared to May's 69%. For more details on the weather during August in Jaco, check out Jaco weather in August.
May and September exhibit similar tropical temperatures, with both months featuring minimums around 25°C (77°F) and average highs peaking at 29°C (84°F) in May and 28°C (83°F) in September. However, May sees slightly higher average temperatures than September. Precipitation levels are comparable, with May recording 474 mm (18.7 in) over 30 days and September showing 461 mm (18.2 in) over 29 days, indicating both months are quite wet. Humidity is also higher in September at 81%, compared to May's 69%, making the air feel even more humid and tropical. For more detailed insights into the weather in September, you can refer to Jaco weather in September.
In comparing the weather between May and October, both months experience similar temperature ranges, with minimums around 25°C (77°F) and maximums peaking at approximately 29°C (84°F) in May, while October sees slightly lower maximums at 28°C (82°F). However, October is notably wetter, receiving 638 mm (25.1 in) of precipitation compared to May's 474 mm (18.7 in), with both months experiencing rain across 30 days. Additionally, October has a higher humidity level at 80%, compared to May's 69%, making the atmosphere feel more muggy during that time. For more detailed information, check out Jaco weather in October.
In comparing the weather between May and November, we see that both months maintain similar temperature ranges, with May experiencing slightly higher averages, peaking at 29°C (84°F) compared to November's maximum of 28°C (82°F). However, May is characterized by significantly higher precipitation, with 474 mm (18.7 in) over 30 days, while November sees 303 mm (11.9 in) across 26 days. Additionally, humidity levels are higher in November at 80%, compared to May's 69%. For more details about November weather in Jaco, you can visit Jaco weather in November.
In May, the weather is characterized by slightly warmer temperatures, with a minimum of 25°C (77°F) and an average of 27°C (81°F), peaking at 29°C (84°F). However, this month also experiences significantly higher rainfall, totaling 474 mm (18.7 in) across 30 days, contributing to a humidity level of 69%. In contrast, December showcases similar temperature averages—min 24°C (76°F) and max 29°C (84°F)—but enjoys much less precipitation, with just 125 mm (4.9 in) over 16 days. The humidity rises slightly to 72%, creating a more humid atmosphere compared to May. For a closer look at December's weather patterns, visit Jaco weather in December.
May in Jaco brings a notable shift in weather as the region transitions into the wet season. With average temperatures hovering around 27°C (81°F), visitors will experience a warm, humid atmosphere accompanied by increased rainfall. Unlike the drier months, May sees nearly 30 days of precipitation, accumulating around 474 mm (18.7 in), transforming the landscape into a vibrant green paradise. While this month may be characterized by its sporadic showers, the warm temperatures make it an excellent time for those who enjoy a lush, tropical environment. For more insights on how May fits into the overall climate patterns, check out Jaco Climate.