Last updated: August 21, 2025
May in Haikou, China, welcomes a blend of warmth and humidity, making it a vibrant month to experience the tropical climate. With maximum temperatures reaching 34°C (94°F) and an average of 28°C (82°F), the days are characterized by a pleasant heat, while cool evenings dip to a minimum of 20°C (69°F). However, be prepared for occasional rain, as this month sees approximately 90 mm (3.6 in) of precipitation spread over 16 days, resulting in a humidity level of 81%. This combination creates a lush environment that is perfect for exploring the city’s natural beauty and enjoying its bustling outdoor life.
May in Haikou, China, ushers in warmer temperatures as the region transitions fully into spring. The month begins with a minimum temperature of 20°C (69°F), climbing to an average of 28°C (82°F) and peaking at a maximum of 34°C (94°F). This trend showcases a steady increase from the cooler early months, with May offering noticeably milder nights and pleasantly warm days that invite outdoor activities. As temperatures rise, residents and visitors alike can relish longer, sun-filled days, making it an ideal time to explore the coastal beauty and vibrant culture of Haikou. With June on the horizon bringing even higher temperatures, May stands as a perfect balance of warmth and livability.
May marks a notable transition in Haikou, China, as precipitation reaches 90 mm (3.6 in), making it one of the wetter months of the year. The city experiences rain on 16 days, signaling the onset of the summer monsoon season and a significant increase compared to the 87 mm of rainfall in April. This rise in precipitation not only enhances the lush green landscapes but also sets the stage for the heavier rains that follow in June and July. With moisture levels escalating, the region prepares for the intensifying humidity and the vibrant life it brings, reinforcing Haikou's tropical charm.
In May, Haikou experiences a notable rise in humidity, reaching 81%, which reflects a gradual upward trend from the 74% recorded in January. As spring transitions into summer, the moisture levels begin to intensify, setting the stage for the steamy months ahead. This increase from 80% in April signifies a consistent pattern, where humidity continues to plateau at 81% through June, before surging into more oppressive levels in July and August. Overall, May marks a pivotal point where the humidity not only peaks for the season but also foreshadows the tropical conditions that characterize Haikou's summer months.
In May, Haikou experiences an extreme UV Index of 13, making it crucial for residents and visitors to take proper sun protection measures. The consistent high levels of UV radiation observed from February through June indicate a trend towards increasingly intense sun exposure as spring transitions into summer. With a burn time of only 10 minutes, it's essential to apply sunscreen, wear protective clothing, and seek shade during peak hours. This pattern continues through the summer months, reinforcing the importance of vigilance against UV damage. For detailed insights and tips on UV safety, visit the Haikou UV Index.
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May in Haikou, China, shines brightly with 314 hours of sunshine, marking a peak in the sun-soaked spring season. This increase reflects a delightful upward trend from the previous months, showcasing a steady climb from January's 191 hours to an impressive high in May. The city's residents and visitors bask in the warmth, as the sun continues to grace Haikou with generous hours well into June and July, where sunlit days reach their pinnacle at 318 hours. As summer approaches, the consistency of sunshine remains strong, creating a vibrant backdrop for outdoor activities and the natural beauty of this coastal gem.
In May, the likelihood of sunny weather in Haikou, China, stands at 48%, showing a slight dip from the more promising months of January and February, which boast chances of sun at 47% and 58%, respectively. As spring progresses into early summer, the sun seems to play hide-and-seek, with April at 50% offering a glimmer of hope. However, this is a precursor to the significantly cloudier months ahead, where June and July see dramatic drops in sunshine likelihood to 17% and 33%. Thus, while May provides a balanced opportunity for sun-soaked days, it hints at the impending shift towards a much wetter season in Haikou.
In Haikou, China, the daylight duration experiences a noticeable progression through the year. Starting in January and February, residents enjoy a consistent 11 hours of daylight, which gradually increases to 12 hours in March and April, signaling the arrival of spring. However, it's in May that the days truly begin to stretch, blooming to 13 hours of sunlight, a trend that continues through June and July, offering plenty of time for outdoor activities. As summer transitions to fall, the daylight gradually tapers off to 12 hours in August and September, before falling back to 11 hours in October and November. Finally, the year closes with shorter days in December, dipping to 10 hours. This rhythm of increasing and decreasing daylight reflects the dynamic essence of Haikou's tropical climate, making each season distinctly vibrant.
In May, Haikou experiences a gentle average wind speed of 4.2 m/s (9 mph), marking a slight decline from the breezier April but still maintaining a pleasant atmosphere for outdoor activities. This month stands out as part of a broader trend where the spring months generally deliver a blend of moderate winds, peaking further as the year progresses. Following a steady pattern, the wind speeds show a gradual increase as the temperatures rise into summer, with an uptick in October reaching a notable 6.8 m/s (15 mph). Overall, May serves as a transitional phase, hinting at the approaching summer, while still offering a comforting breeze that enhances the charm of Haikou's landscape.
Weather in Haikou varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Haikou, focusing on differences in temperature, rainfall, humidity, and UV levels.
May and January exhibit distinct differences in weather patterns. In May, temperatures range from a minimum of 20°C (69°F) to a maximum of 34°C (94°F), with an average of 28°C (82°F). This month also experiences significant rainfall, with 90 mm (3.6 in) spread over 16 days, resulting in high humidity levels at 81%. In contrast, January presents milder conditions, featuring a minimum temperature of 10°C (50°F) and a maximum of 25°C (77°F), with an average temperature of 19°C (67°F). Precipitation is considerably lower, totaling just 23 mm (0.9 in) over 6 days, and the humidity is slightly lower at 74%. For more details, you can visit Haikou weather in January.
In comparing the weather between May and February, we see a marked difference in temperatures and humidity levels. May brings warmer temperatures, with a minimum of 20°C (69°F) and an average high of 34°C (94°F), while February has cooler minimums at 10°C (51°F) and typically peaks at 29°C (84°F). Additionally, May experiences significantly more rainfall, with 90 mm (3.6 in) over 16 days compared to February's 39 mm (1.5 in) across just 6 days. Humidity is also higher in May at 81%, compared to February's 75%. For a more detailed look at February's climate, visit Haikou weather in February.
In May, the weather is warmer and more humid compared to March, with average temperatures soaring to 28°C (82°F) and highs reaching up to 34°C (94°F). The month also experiences significantly more precipitation, totaling 90 mm (3.6 in) over 16 days, which contributes to an increased humidity level of 81%. In contrast, March features milder temperatures, with an average of 23°C (74°F) and maximums of 32°C (89°F), alongside lower rainfall of 30 mm (1.2 in) over just 8 days, keeping humidity at a relatively comfortable 78%. For a detailed look at the weather specifics during this month, check out Haikou weather in March.
In comparing the weather between April and May, it is clear that May experiences slightly warmer temperatures overall. The minimum temperature in May is 20°C (69°F), compared to April's 17°C (63°F), with May's average reaching 28°C (82°F) versus April's 25°C (77°F). Both months have similar maximum temperatures, with May peaking at 34°C (94°F) and April at 33°C (92°F). Precipitation levels are quite close, with May seeing 90 mm (3.6 in) over 16 days, while April has 87 mm (3.4 in) over 13 days. Humidity is slightly higher in May at 81%, compared to April's 80%. For a more detailed look at April's weather, you can visit Haikou weather in April.
In comparing the weather between May and June, we see a noticeable warmth and slight increase in rain. May typically starts with temperatures ranging from a minimum of 20°C (69°F) to a maximum of 34°C (94°F), with an average of 28°C (82°F) and total precipitation of 90 mm (3.6 in) over 16 days. In contrast, June experiences slightly higher temperatures, with a minimum of 26°C (78°F) and a maximum of 35°C (95°F), averaging 29°C (85°F). Additionally, June records increased precipitation at 134 mm (5.3 in) over 15 days, maintaining the same humidity level of 81%. For more details, you can visit Haikou weather in June.
In May, temperatures begin to rise, ranging from a minimum of 20°C (69°F) to a maximum of 34°C (94°F), with an average temperature of 28°C (82°F). The month experiences significant rainfall, accumulating 90 mm (3.6 in) over 16 days, accompanied by high humidity levels at 81%. In contrast, July sees even warmer temperatures, with a minimum of 26°C (78°F) and a maximum of 36°C (97°F), and an average of 29°C (85°F). Precipitation increases notably to 169 mm (6.6 in) over 18 days, resulting in a higher humidity of 87%. For a more detailed look at the weather specifics during this month, refer to Haikou weather in July.
In comparing the weather in May and August, it’s clear that August tends to be warmer and much wetter. May boasts a minimum temperature of 20°C (69°F) and an average of 28°C (82°F), with a maximum reaching 34°C (94°F). In contrast, August starts at a higher minimum of 26°C (78°F) and averages 29°C (84°F), peaking at 33°C (92°F). While May experiences about 90 mm (3.6 in) of precipitation over 16 days, August sees a significant increase to 275 mm (10.8 in) across 21 days, making it the wetter month. Humidity also rises slightly from 81% in May to 86% in August, contributing to the overall muggy climate. For more detailed information on August weather, visit Haikou weather in August.
In May, temperatures typically range from a minimum of 20°C (69°F) to a maximum of 34°C (94°F), with an average temperature of 28°C (82°F). The month experiences about 90 mm (3.6 in) of rainfall over 16 days, with humidity levels around 81%. In contrast, September sees slightly warmer temperatures, with a minimum of 25°C (77°F) and a maximum of 33°C (91°F), while maintaining a similar average of 28°C (83°F). However, September experiences a higher precipitation total of 159 mm (6.3 in) across 18 days, alongside a similar humidity level of 82%. For more detailed information, you can check Haikou weather in September.
May and October present distinct weather patterns, with May typically feeling warmer and sunnier. In May, temperatures range from a minimum of 20°C (69°F) to a maximum of 34°C (94°F), leading to an average of 28°C (82°F). Precipitation is moderate, totaling 90 mm (3.6 in) over 16 days, accompanied by high humidity at 81%. In contrast, October experiences slightly cooler temperatures, with a minimum of 21°C (70°F), an average of 26°C (79°F), and a maximum of 31°C (88°F). However, it sees significantly more rainfall, with 215 mm (8.5 in) across 18 days, while maintaining the same humidity level of 81%. This makes October a wetter month overall. For detailed information on October weather, check Haikou weather in October.
May typically boasts warmer temperatures compared to November, with minimums around 20°C (69°F) and maximums reaching up to 34°C (94°F), while November sees slightly cooler temperatures ranging from a minimum of 17°C (63°F) to a maximum of 28°C (83°F). Additionally, May experiences a higher level of precipitation, averaging 90 mm (3.6 in) over 16 days, in contrast to November's milder 43 mm (1.7 in) spread across just 9 days. Despite these differences, both months maintain a relatively high humidity level, with May at 81% and November at 80%. For more details, you can check Haikou weather in November.
In May, the weather is typically warm and humid, with temperatures ranging from a minimum of 20°C (69°F) to a maximum of 34°C (94°F), and an average temperature of 28°C (82°F). This month also sees a significant amount of rainfall, with about 90 mm (3.6 in) of precipitation spread over 16 days, resulting in a humidity level of 81%.
In contrast, December brings milder temperatures, with a range from 13°C (56°F) to 27°C (80°F) and an average of 20°C (69°F). Rainfall decreases markedly, totaling only 28 mm (1.1 in) over 8 days, accompanied by slightly lower humidity at 79%. For more details about December weather in Haikou, you can explore Haikou weather in December.
As May unfolds in Haikou, the warmth intensifies, characterized by soaring temperatures and high humidity levels that set the stage for a tropical feel. Unlike the cooler months preceding it, the average climate reaches a pleasant balance, though occasional rain showers remind residents and visitors alike of the impending summer. With about half the month experiencing rainfall, it becomes a transitional period where preparation for the peak summer heat is key. This vibrant shift makes May an intriguing time in Haikou, inviting exploration under the sun while navigating the occasional drizzle. For more insights on Haikou's climate patterns, check out Haikou Climate.