Last updated: August 21, 2025
In Hainan, China, May brings a delightful blend of warmth and moisture, making it a vibrant time to experience the region. With maximum temperatures reaching up to 31°C (89°F), this month offers pleasant sunny days ideal for outdoor activities. The average temperature hovers around 14°C (58°F), while minimum temperatures can dip to 0°C (33°F), providing a comfortable range for all. Rainfall is notable, with an average precipitation amount of 72 mm (2.8 in) spread over 11 days, contributing to the region's lush landscape. Additionally, the humidity level sits at a moderate 61%, adding a touch of tropical allure to the atmosphere. May in Hainan is truly a unique experience, perfect for nature lovers and adventurers alike.
In May, Hainan, China, experiences a welcome transition to warmer weather, with temperatures ranging from a minimal 0°C (33°F) to a maximum of 31°C (89°F). The average temperature climbs to a pleasant 14°C (58°F), signaling the arrival of spring. This marked increase from the colder months showcases a steady warming trend, as May's temperatures are notably higher than earlier in the year, such as January's frigid lows around -38°C (-36°F). As the region moves into this sunnier month, visitors can expect delightful weather perfect for outdoor activities, with significant temperature variations hinting at a vibrant and sunny atmosphere. Such climatic changes emphasize Hainan's appealing environment as it transitions into the summer season.
May marks a significant transition in Hainan, China, as the region experiences a noteworthy increase in precipitation. With 72 mm (2.8 in) of rain over 11 days, May sets the stage for the summer months, showcasing a sharp rise from the previous months' totals. This uptick is part of a broader trend, as rainfall begins to intensify, culminating in even heavier deluges in June and July. The steady progression from just 5 mm in January to a substantial 72 mm in May highlights the shift towards the monsoon season, reflecting a pattern of increased frequency and volume of rainfall that enhances the lush tropical landscape of Hainan. As the rains become more abundant, they play a crucial role in supporting the island's vibrant ecosystem and agricultural activities.
As spring gives way to summer in Hainan, China, May experiences a moderate humidity level of 61%, presenting a pleasant atmosphere before the heavier moisture sets in. This marks a subtle shift from the drier months of March and April, which recorded lower humidity at 63% and 59%, respectively. The environment remains comfortable while hinting at the upcoming peak humidity levels of July and August, where figures soar above 80%. Overall, May serves as a transitional month, balancing the lingering freshness of spring with the impending sultriness of the summer months, making it an ideal time to explore the beauty of Hainan.
As May rolls around in Hainan, China, residents and visitors can expect a UVI of 7, classified as high exposure. This marks a noticeable shift from the milder months of January through April, where the UV Index steadily increased from 2 to 6. With a burn time of just 25 minutes in May, it is essential to be mindful of sun protection measures. As summer approaches, the UV levels will continue to rise, peaking in June and July, making it crucial to stay informed and safe under the sun. For more details on UV levels throughout the year, visit Hainan UV Index.
UV Risk Categories
As the year unfolds, May shines brightly in Hainan, China, boasting an impressive 330 hours of sunshine—the peak of spring's warmth. Following a steady increase from 182 hours in January, the month of May exemplifies the island's transition into its sun-drenched summer. The sunshine hours continue to build momentum through the months, peaking in July with 341 hours, before gradually tapering off in the latter part of the year. This upward trend not only highlights Hainan's appeal as a year-round destination for sun seekers but also marks May as a particularly delightful time to soak up the radiant weather before the summer heat intensifies.
While May in Hainan, China typically welcomes the onset of summer, the likelihood of sunny weather sees a notable dip, with only a 46% chance of sunshine. This marks a decrease from the preceding months of April and March, which both enjoy sun probabilities of 51% and 57%, respectively. As the region transitions into the warmer months, the chance of clear skies continues to decline, plummeting to just 27% in July, the least sunny month of the year. Interestingly, as autumn approaches, the chances of enjoying bright days notably rebound, peaking at 68% in December. Thus, while May might present some cloud cover, the promise of sunny days returns with the turn of the seasons later in the year.
In Hainan, China, the daylight duration undergoes a captivating evolution throughout the year, culminating in an impressive 15 hours of sunlight in both May and June. As winter fades, January's 8 hours gradually expands, with February and March bringing noticeable increases to 10 and 11 hours respectively. The arrival of spring in April ushers in longer days, leading to the peak daylight of 15 hours in May—perfect for outdoor activities and soaking up the sun. Following this zenith, summer days maintain their length, before a gradual tapering begins in late summer and autumn, eventually returning to 8 hours by December. This trend showcases Hainan's vibrant seasonal shifts, inviting both residents and visitors to take full advantage of the sun-drenched days of spring and early summer.
In May, Hainan enjoys a delightful blend of mild winds and warming temperatures, with an average wind speed of 3.7 m/s (8 mph). This month marks a slight dip in wind speeds compared to the stronger breezes in April, which averaged 4.0 m/s (9 mph). Overall, May’s winds signal a transition as the island approaches the hotter summer months, following a trend where wind speeds generally decrease as summer arrives. As the winds calm post-April, they set the stage for pleasant outdoor activities, maintaining a refreshing ambiance ideal for beachgoers and nature enthusiasts alike.
Weather in Hainan varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Hainan, focusing on differences in temperature, rainfall, humidity, and UV levels.
May and January exhibit starkly contrasting weather conditions. In May, temperatures range from a chilly 0°C (33°F) to a warm 31°C (89°F), with an average of 14°C (58°F) and a relatively high humidity of 61%. This month sees about 72 mm (2.8 in) of precipitation spread over 11 days, indicating a notable level of moisture in the air. In contrast, January presents a harsh winter climate, featuring minimum temperatures plunging to -38°C (-36°F) and maximums only reaching -3°C (27°F), with an average of -20°C (-4°F). The month records minimal precipitation of just 5 mm (0.2 in) over one day and higher humidity of 75%, compounding the biting cold. For a closer look at January conditions, you can visit Hainan weather in January.
May and February present striking contrasts in weather conditions. While February features frigid temperatures with a minimum of -33°C (-27°F) and an average of -15°C (5°F), May offers a much milder climate, with temperatures ranging from a minimum of 0°C (33°F) to an average of 14°C (58°F) and peaking at 31°C (89°F). Additionally, February sees minimal precipitation with only 6 mm (0.2 in) across just 1 day, whereas May experiences more considerable rainfall, totaling 72 mm (2.8 in) over 11 days. Despite May's lower humidity at 61%, it creates a significant difference in comfort compared to February's higher humidity of 70%. For more details on February weather, check out Hainan weather in February.
The weather in March and May exhibits stark contrasts, showcasing the transition from winter to spring. In March, temperatures range significantly from a frigid minimum of -31°C (-23°F) to a maximum of 17°C (63°F), with an average temperature of -3°C (26°F). This month experiences low precipitation levels at just 13 mm (0.5 in) across 3 days, coupled with a humidity of 63%. In contrast, May warms up considerably, with temperatures ranging from a minimum of 0°C (33°F) to a maximum of 31°C (89°F), averaging at 14°C (58°F). Precipitation in May increases to 72 mm (2.8 in) over 11 days, while humidity remains relatively stable at 61%. For those interested in more specific weather patterns, you can check Hainan weather in March.
In comparison to April, May experiences significantly warmer temperatures, with average highs reaching up to 31°C (89°F) compared to April's maximum of 25°C (78°F). While April has a lower minimum temperature of -9°C (16°F) and an average of 7°C (44°F), May’s minimum sits at a more moderate 0°C (33°F) and an average of 14°C (58°F). Additionally, May is wetter, receiving 72 mm (2.8 in) of precipitation over 11 days, whereas April sees only 32 mm (1.3 in) across 4 days. Humidity remains relatively similar between the two months, with May at 61% and April at 59%. For more detailed information, you can check Hainan weather in April.
May and June present a noticeable shift in weather patterns. In May, temperatures range from a cool 0°C (33°F) at night to a warm 31°C (89°F) during the day, with an average of 14°C (58°F). The month also sees moderate rainfall, totaling 72 mm (2.8 in) over 11 days, and a relatively comfortable humidity level of 61%.
In contrast, June offers warmer temperatures, with a minimum of 6°C (43°F) and a peak of 36°C (97°F), resulting in a higher average of 19°C (67°F). However, this month experiences increased precipitation, with 126 mm (4.9 in) falling over 15 days, and a spike in humidity to 79%. This transition signifies a move from a milder spring to a more humid and hotter summer climate. For more detailed insights, check Hainan weather in June.
In May, temperatures in Hainan range from a chilly 0°C (33°F) to a warm 31°C (89°F), with an average temperature of 14°C (58°F). The month sees about 72 mm (2.8 in) of precipitation over 11 days, contributing to a humidity level of 61%. In contrast, July experiences much warmer weather, with temperatures ranging from a minimum of 13°C (57°F) to a maximum of 34°C (93°F) and an average of 23°C (74°F). However, July is also wetter, recording 175 mm (6.9 in) of precipitation over 17 days and a higher humidity of 84%. For more details on July’s weather, check out Hainan weather in July.
In May, temperatures range from a chilly minimum of 0°C (33°F) to a warm maximum of 31°C (89°F), with an average of 14°C (58°F). The month sees moderate precipitation of 72 mm (2.8 in) spread over 11 days, coupled with a humidity level of 61%. In contrast, August boasts warmer average temperatures of around 20°C (69°F), with a minimum of 6°C (42°F) and a maximum of 29°C (85°F). However, this warmth comes with a significant increase in rainfall, totaling 183 mm (7.2 in) over 17 days, and higher humidity at 87%. For a closer look at what to expect, you can check out Hainan weather in August.
In May, temperatures range from a chilly 0°C (33°F) to a warm 31°C (89°F), with an average of 14°C (58°F). The month experiences moderate precipitation of 72 mm (2.8 in) over about 11 days, and humidity levels hover around 61%. In contrast, September sees a slight drop in maximum temperatures, peaking at 28°C (83°F), while the average rises to 15°C (59°F). This month experiences higher precipitation, totaling 103 mm (4.1 in) over 9 days, and humidity increases significantly to 85%. For more details on September weather, you can visit Hainan weather in September.
May and October present quite contrasting weather patterns. In May, temperatures range from a minimum of 0°C (33°F) to a maximum of 31°C (89°F), with an average temperature of 14°C (58°F). The month experiences relatively higher precipitation of 72 mm (2.8 in) over about 11 days, along with a moderate humidity level of 61%. Conversely, October features colder temperatures, with a minimum of -10°C (15°F) and a maximum of 27°C (80°F), averaging just 6°C (42°F). This month is much drier, with only 22 mm (0.9 in) of rain spread over approximately 4 days and a higher humidity of 80%. For more detailed climate insights, you can check Hainan weather in October.
May and November present stark contrasts in weather conditions. In May, temperatures range from a low of 0°C (33°F) to a high of 31°C (89°F), with an average temperature of 14°C (58°F). This month sees a significant amount of precipitation, totaling 72 mm (2.8 in) over approximately 11 days, contributing to a relatively humid atmosphere at 61%. In contrast, November experiences much colder temperatures, with a minimum of -25°C (-14°F) and an average of -6°C (21°F), peaking at just 14°C (57°F). Precipitation is minimal in November at 22 mm (0.9 in) over 4 days, yet the humidity remains consistent at 61%. For more detailed insights on November weather, you can check Hainan weather in November.
In comparing the weather of May and December, it's evident that these months present strikingly different climates. May enjoys a mild temperature range with a minimum of 0°C (33°F) and a maximum of 31°C (89°F), featuring an average temperature of 14°C (58°F). With 72 mm (2.8 in) of precipitation over 11 days, May showcases a relatively humid environment at 61%. In contrast, December descends into the depths of winter, with temperatures plummeting to a minimum of -32°C (-26°F) and averaging -18°C (0°F). The peak temperature reaches just 6°C (43°F), and precipitation is significantly lower at only 9 mm (0.3 in) across 2 days, resulting in a slight humidity of 60%. For more detailed information, you can visit Hainan weather in December.
May in Hainan marks a delightful transition into the warmth of summer, showcasing higher temperatures compared to previous months. With a maximum of 31°C and an average of 14°C, outdoor activities become even more inviting. However, this month also brings a hint of humidity and light rainfall, with about 72 mm of precipitation over 11 days. The lush landscapes thrive during this period, making May an ideal time for nature lovers to explore the beauty of Hainan. For a deeper dive into Hainan's weather patterns, check out Hainan Climate.