Last updated: August 21, 2025
In May, Haikou, China experiences a delightful interplay of warmth and moisture, making it an inviting month for visitors. With maximum temperatures reaching up to 32°C (90°F) and an average of 23°C (74°F), the days are pleasantly warm, while the nights cool down to a comfortable minimum of 14°C (57°F). However, prepare for the possibility of frequent rain, as the city witnesses 155 mm (6.1 in) of precipitation over approximately 15 days, all enveloped in a high humidity level of 85%. This blend of weather conditions creates a lush landscape, ideal for exploring Haikou's natural beauty and vibrant atmosphere.
In May, Haikou, China, experiences a delightful transition into warmth, with temperatures showing a significant rise. The minimum temperature climbs to a pleasant 14°C (57°F), while the average settles at a comfortable 23°C (74°F). This month marks a notable peak, as the maximum temperature reaches an invigorating 32°C (90°F), indicating the onset of summer. Compared to the cooler months preceding it, May sees a substantial increase, fostering outdoor activities and vibrant local life. As the city basks in the growing heat, the climate invites both residents and visitors to enjoy the sun-soaked days ahead.
In Haikou, China, May marks a notable peak in precipitation, with an impressive 155 mm (6.1 in) of rain falling over 15 days. This significant increase follows April's relatively moderate rainfall of 88 mm (3.5 in), highlighting a clear upward trend as the region transitions into the wetter summer months. By May, the frequency of rainfall begins to ramp up, contributing to the month's lush growth and vibrant landscapes. This pattern continues into June, where precipitation soars to 269 mm (10.6 in), underscoring the onset of the rainy season. The dramatic rise in both rainfall and rainy days from April to May signals a shift, preparing the region for the heavy downpours of summer.
As spring fades and summer approaches, May in Haikou, China sees a notable uptick in humidity, reaching 85%—the highest level of the year. This transition marks a shift from the slightly cooler and drier months of January through April, which hover around 73% to 81%. The rising humidity in May signals the onset of the tropical climate, paving the way for the sultry summer months ahead. Following May, humidity levels remain high, averaging between 81% and 84% from June to August, creating a consistent atmosphere that defines the region's warm season. As autumn arrives in September, humidity levels dip significantly to 70%, providing a brief respite before the cycle begins anew.
As May rolls into Haikou, the UV Index remains at an extreme level of 12, consistent with the previous month's readings. This level of ultraviolet radiation signifies a critical need for sun protection, as the recommended burn time is just 10 minutes. The intensity of UV exposure peaking at this time of year suggests that residents and visitors alike should be vigilant about sun safety. Following May, the UV Index sees a slight increase in June, reaching 13, illustrating an upward trend in UV intensity as summer approaches. Overall, the data underscores the importance of adjusting sun protection practices throughout the season to ensure safety under the sun. For more detailed information, visit Haikou UV Index.
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May is a radiant month in Haikou, China, boasting 297 hours of sunshine that heralds the arrival of summer. This increase in sunlight marks a peak in the yearly trend, building on the steady rise from 188 hours in January to the sun-kissed days of April. As the city bathes in these bright hours, it transitions seamlessly into the sultry summer months of July and August, where sunshine continues to flourish, reaching 331 hours in July. However, this sunny exuberance starts to taper off slightly in September and October, indicating a seasonal shift. The overall pattern highlights Haikou's warm climate, making May not just a turning point, but a celebration of light and warmth in this coastal paradise.
In Haikou, China, the likelihood of sunny weather takes a notable dip in May, with a mere 15% chance of sunshine. This decline follows a trend from the previous months, where sunny prospects gradually shrank, dropping from 53% in January to just 30% in April. As temperatures rise approaching summer, the chance for sunny days continues to plummet, reaching a low of only 5% in June. Interestingly, September sees a resurgence, returning to a more favorable 52% chance of sunny weather, hinting at the cyclical nature of weather patterns in the region.
In Haikou, China, daylight duration experiences a distinct progression throughout the year, reflecting the transition from winter to summer. January begins with a modest 10 hours of daylight, gradually increasing to 11 hours in February. As spring unfolds, March and April enjoy an even longer 12 hours of luminous skies, creating a sense of anticipation for the warmer months ahead. May marks the beginning of summer, with daylight peaking at a delightful 13 hours, a duration that persists through June and July. Following this sun-soaked peak, daylight gently tapers back to 12 hours in August and returns to 11 hours in October. The cycle concludes with the shorter winter months, where November and December see daylight again capped at 10 hours. This pattern highlights the rhythmic beauty of Haikou’s seasonal changes, inviting locals and visitors alike to revel in the sun's embrace.
In May, Haikou experiences a gentle breeze, with an average wind speed of 3.9 m/s (9 mph), slightly lower than the preceding months. This subtle shift signifies a transition towards warmer summer days, as the wind begins to calm compared to the higher speeds of January through April. Interestingly, the wind's ebb continues into June before picking up again in the latter half of the year, culminating in October's peak of 6.5 m/s (14 mph). As such, May serves as a delicate point in Haikou’s climatological rhythm, where the air is tantalizingly still, inviting outdoor relaxation amid the blooming season.
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 present contrasting weather patterns. In May, temperatures are noticeably warmer, with minimums around 14°C (57°F) and maximums reaching up to 32°C (90°F), while January's temperatures range from a chilly minimum of 3°C (38°F) to a maximum of 24°C (76°F). Precipitation is significantly higher in May with 155 mm (6.1 in) over 15 days, compared to January's mere 45 mm (1.8 in) across just 6 days. Additionally, May's humidity is quite high at 85%, making the air feel more oppressive compared to January's lower humidity level of 73%. For more information, you can check the detailed Haikou weather in January.
In comparison, May presents a much warmer climate than February, with average temperatures soaring to 23°C (74°F) compared to February's cooler 12°C (54°F). While May can reach highs of 32°C (90°F), February's maximum temperature is a more modest 24°C (76°F). Additionally, May is marked by higher precipitation levels, receiving 155 mm (6.1 in) over approximately 15 days, whereas February experiences significantly less rainfall with 70 mm (2.8 in) over 9 days. The humidity also peaks in May at 85%, compared to February's 73%. For more insights on February's weather, you can visit Haikou weather in February.
In comparison, May features significantly warmer temperatures than March, with averages reaching 23°C (74°F) compared to March’s much cooler 15°C (60°F). May boasts maximum temperatures of 32°C (90°F), while March peaks at 26°C (80°F). Precipitation is also higher in May, totaling 155 mm (6.1 in) over 15 days, versus March's 123 mm (4.8 in) over 14 days, although the humidity is slightly higher in May at 85% compared to March's 80%. For a closer look at the specifics of March weather, you can visit Haikou weather in March.
In comparing the weather between April and May, we observe a notable increase in temperatures during May, with average highs reaching 32°C (90°F), compared to April's maximum of 29°C (84°F). Additionally, May experiences higher overall precipitation, totaling 155 mm (6.1 in) over 15 days, while April sees only 88 mm (3.5 in) across 11 days. Humidity levels also rise slightly in May, averaging 85% compared to April's 81%. For more detailed information on April's weather, you can refer to Haikou weather in April.
May and June present distinct weather patterns, with June generally offering warmer temperatures and increased rainfall. In May, the temperatures range from a minimum of 14°C (57°F) to a maximum of 32°C (90°F), with an average of 23°C (74°F). The month sees about 155 mm (6.1 in) of precipitation over 15 days, alongside high humidity levels at 85%. In contrast, June features a milder minimum temperature of 20°C (69°F), an average of 27°C (80°F), and a peak of 33°C (92°F). However, it experiences a significant uptick in rainfall, totaling 269 mm (10.6 in) over 18 days, with slightly lower humidity at 81%. For more details, check Haikou weather in June.
May and July present distinct contrasts in weather. In May, temperatures range from a minimum of 14°C (57°F) to a maximum of 32°C (90°F), with an average of 23°C (74°F). This month is characterized by relatively high precipitation of 155 mm (6.1 in) spread over 15 days, coupled with high humidity at 85%. In contrast, July is notably warmer, with temperatures ranging from a minimum of 25°C (78°F) to a maximum of 35°C (95°F) and an average of 29°C (84°F). The rainfall is significantly reduced to 83 mm (3.3 in) over just 13 days, and the humidity remains slightly lower at 84%. For a detailed look at the weather in July, you can visit Haikou weather in July.
In May, the weather typically ranges from a minimum of 14°C (57°F) to a maximum of 32°C (90°F), with an average temperature of 23°C (74°F). The month experiences significant rainfall, with about 155 mm (6.1 in) of precipitation spread over approximately 15 days, accompanied by high humidity levels of around 85%. In contrast, August sees warmer temperatures, with a minimum of 25°C (76°F) and a maximum of 35°C (95°F), averaging 29°C (84°F). Rainfall is even more pronounced, totaling 260 mm (10.2 in) across 20 days, while humidity remains slightly lower at 82%. For more details, check out Haikou weather in August.
May and September present distinct weather patterns, with May generally experiencing cooler temperatures and higher humidity. In May, temperatures range from a minimum of 14°C (57°F) to a maximum of 32°C (90°F), coupled with an average temperature of 23°C (74°F). This month also sees significant rainfall, with 155 mm (6.1 in) of precipitation falling over 15 days, and humidity levels soaring at 85%.
In contrast, September is warmer, with temperatures ranging from a minimum of 20°C (68°F) to a maximum of 35°C (96°F), and an average of 27°C (81°F). While September still sees rainfall, it is less than in May, with 105 mm (4.1 in) over the same number of days. Humidity is also lower at 70%, making September feel more comfortable. For a detailed look at September weather, check out Haikou weather in September.
May and October share a similar average temperature of 23°C (74°F), providing mild and comfortable conditions. However, May tends to be more humid, with an average humidity of 85%, while October's humidity is lower at 73%. In terms of rainfall, May experiences significantly more precipitation, with 155 mm (6.1 in) over 15 days, compared to October's 71 mm (2.8 in) over 12 days. Overall, October offers slightly warmer minimum temperatures and less rainfall, making it a drier option for outdoor activities. For more details, you can check Haikou weather in October.
May and November offer distinctly different weather patterns. In May, temperatures range from a minimum of 14°C (57°F) to a maximum of 32°C (90°F), with an average of 23°C (74°F). The month is marked by significant rainfall of 155 mm (6.1 in) over about 15 days, contributing to high humidity levels at 85%. In contrast, November experiences cooler temperatures, with a minimum of 11°C (53°F), an average of 19°C (67°F), and a maximum of 28°C (83°F). Additionally, November has much lower precipitation, totaling 65 mm (2.6 in) over around 10 days, and a slightly reduced humidity of 77%. For more specific details about the weather in November, you can check Haikou weather in November.
May and December exhibit distinct weather patterns, highlighting the transition from spring to winter. In May, temperatures range from a minimum of 14°C (57°F) to a maximum of 32°C (90°F), with an average of 23°C (74°F). The month sees considerable precipitation, totaling about 155 mm (6.1 inches) over 15 days, accompanied by high humidity at 85%. In contrast, December experiences cooler temperatures, with a minimum of 7°C (45°F), an average of 14°C (58°F), and a maximum of 25°C (77°F). The precipitation in December is significantly lower at 49 mm (1.9 inches) over just 9 days, and humidity also decreases to 79%. For a closer look at December weather specifics, you can refer to Haikou weather in December.
In May, Haikou experiences a delightful transition as temperatures rise, making it significantly warmer compared to the earlier months. With an average temperature of 23°C (74°F), the city welcomes more sunshine, although it also sees an increase in humidity at a remarkable 85%. Be prepared for frequent rain showers, as the month averages 15 days of precipitation, totaling around 155 mm (6.1 in). This combination of warmth and humidity creates a vibrant, lush landscape, setting the stage for the summer ahead. For a comprehensive overview of what to expect throughout the year, check out Haikou Climate.