Last updated: August 21, 2025
In May, Haikou, China experiences a diverse range of weather, with maximum temperatures reaching up to 36°C (97°F) and a comfortable average of 23°C (74°F). The month is characterized by increased humidity, averaging an impressive 87%, which contributes to the lush surroundings. However, residents can expect significant rainfall, totaling 244 mm (9.6 in) over 16 days, making it prudent to carry an umbrella. Whether basking in the sun or navigating through showers, May offers a vibrant glimpse of Haikou’s tropical climate.
In May, Haikou, China, experiences a delightful transition into warmer weather, with minimum temperatures rising to 11°C (52°F) and average highs peaking at a scorching 36°C (97°F). This month clearly marks a shift from the cooler temperatures of earlier spring, as the average temperature soars to 23°C (74°F), providing an ideal backdrop for outdoor adventures. As humidity begins to climb, the city transforms into a vibrant backdrop of blossoming flora, attracting both locals and visitors alike. With a steady increase in warmth from the earlier months—a striking contrast to January's chilly lows of -5°C (24°F)—May invites everyone to bask in its sunny embrace before the peak summer heat sets in.
In May, Haikou experiences one of its wettest months, with a significant precipitation amount of 244 mm (9.6 in) spread over 16 days. This marks a notable increase from the previous months, particularly compared to April's 179 mm. The rainfall during this time heralds the onset of the rainy season, contrasting sharply with the drier months of October and November, which see much lower totals. As the city transitions into June, precipitation climbs even higher, indicating a trend of escalating rainfall as summer approaches. This peak in precipitation patterns not only shapes the local ecosystem but also influences the daily life of residents as they adapt to the increased moisture and humidity.
In May, Haikou, China, experiences a notable peak in humidity, reaching 87%. This high level, consistent with the preceding month's measurement of 86%, marks the transition to summer when humidity typically intensifies. The trend indicates a steady increase from January’s 65%, gradually escalating through the spring months. By May, the humidity not only reflects the warming temperatures but also sets the stage for the even more humid conditions of July, which sees the highest average at 91%. Following this peak, humidity stabilizes during the summer before tapering off in the autumn months, demonstrating Haikou's characteristic tropical climate.
As May rolls into Haikou, China, residents and visitors alike should brace for the sun’s relentless rays, marked by a striking UV Index of 11 that categorizes exposure as extreme. This significant uptick from April’s UV Index of 10 highlights a trend toward more intense sun exposure as the year progresses, prompting a reduced burn time of just 10 minutes. As summer approaches, the UV Index remains perilously high, peaking in June and July at 12, reinforcing the importance of sun safety measures. With burn times declining sharply, it’s crucial to stay vigilant and protect your skin during these sun-splashed months. For more details on UV levels throughout the year, check out Haikou UV Index.
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In May, Haikou basks in the warmth of 283 hours of sunshine, heralding the onset of summer with its vibrant glow. This marks a delightful peak in bright days, following a steady increase from 159 hours in January to over 240 hours by April. As the month progresses, the sun approaches its zenith, energizing the city with an inviting atmosphere that fosters outdoor adventures and scenic explorations. With June's sunshine slightly dipping to 241 hours, it's clear that May stands out as a radiant transitional phase, showcasing the island's beautiful weather just before the sultry summer months unfold. This May sunshine not only enhances the natural beauty of Haikou but also elevates the local spirit, embracing a lively and sunny ambiance.
In Haikou, China, the likelihood of sunny weather takes a noticeable dip in May, with only a 21% chance of sunshine. This trend follows a gradual decline from the peak in January at 58%, and suggests that as spring gives way to summer, the skies tend to cloud over. Interestingly, the sunny days have a resurgence in September with 61%, indicating that while May may feel a bit gloomy, the post-summer months are more likely to bring brightness back to the region. As the weather patterns unfold across the year, May stands out as a transitional month, where sunshine becomes more elusive before the seasonal shift brings clearer skies later.
In Haikou, China, the daylight duration evolves significantly throughout the year, showcasing a clear seasonal rhythm. January begins with 10 hours of daylight, gradually increasing to 13 hours by May. This peak in daylight duration occurs during the late spring and early summer months of May, June, July, and August, where residents can bask in extended sunshine. As autumn approaches, daylight begins to taper off, returning to 12 hours in September and gradually diminishing to 10 hours by December. This cyclical pattern not only enhances outdoor activities during the vibrant summer months but also marks a transition into cozy, shorter days as the year winds down. Overall, Haikou's daylight landscape reflects a dynamic interplay between the seasons, providing a vibrant backdrop for both locals and visitors alike.
In May, Haikou experiences a gentle breeze with an average wind speed of 1.8 m/s (4 mph), marking a slight decline from the consistent speeds of 2.0 m/s (5 mph) seen in the preceding months. This month serves as a transition into warmer summer days, with wind patterns indicating a subtle reduction in intensity. June follows with even lighter winds, reaching a minimum of 1.6 m/s (4 mph), while July brings a revival with an increase to 2.2 m/s (5 mph), hinting at the island's dynamic weather system. Overall, the trend shows a light yet variable wind flow that complements the warm coastal climate, making May an inviting time for outdoor activities.
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.
In May, the weather is markedly warmer and more humid compared to January. With average temperatures ranging from a minimum of 11°C (52°F) to a maximum of 36°C (97°F), May experiences a vibrant warmth that contrasts sharply with January's cooler averages of -5°C (24°F) to 24°C (75°F). Additionally, May sees a significant amount of rainfall, with 244 mm (9.6 in) over 16 days, while January is much drier with only 70 mm (2.7 in) across 9 days. The humidity levels also differ, as May boasts a high of 87%, whereas January maintains a lower 65%. For those interested in January's climate specifics, you can find more details here: Haikou weather in January.
In comparing the weather in May and February, May showcases significantly warmer temperatures with an average of 23°C (74°F), peaking at a high of 36°C (97°F), while February’s temperatures are much cooler, averaging 9°C (48°F) and reaching a maximum of 26°C (79°F). The humidity in May is notably higher at 87%, compared to February’s 71%, contributing to a more oppressive feel during the warmer month. Additionally, May experiences more rainfall, with 244 mm (9.6 in) over 16 days, whereas February is relatively dry with 83 mm (3.3 in) over 12 days. For more detailed insights into February's climate, you can check Haikou weather in February.
In comparing the weather between March and May, May is notably warmer, with average temperatures reaching 23°C (74°F) compared to March's 14°C (58°F). While March enjoys a maximum temperature of 30°C (86°F), May can soar to a high of 36°C (97°F), making it the hotter month overall. Both months see similar precipitation levels, with May recording 244 mm (9.6 in) over 16 days and March slightly lower at 205 mm (8.1 in) over the same number of days. However, humidity is higher in May at 87%, compared to 81% in March, contributing to a more humid atmosphere as spring transitions into summer. For more specific details about the weather in March, you can check Haikou weather in March.
In comparing the weather of May and April, we see a notable increase in temperature and precipitation. May boasts a minimum temperature of 11°C (52°F) and an average high of 36°C (97°F), significantly warmer than April's minimum of 5°C (41°F) and maximum of 33°C (91°F). Additionally, May experiences more rainfall, with 244 mm (9.6 in) over 16 days compared to April's 179 mm (7.0 in) over 14 days. The humidity remains relatively constant, with May at 87% and April at 86%. For more details on April weather, you can visit Haikou weather in April.
In May, the weather features a milder range with minimum temperatures at 11°C (52°F) and an average of 23°C (74°F), peaking at a maximum of 36°C (97°F). The month sees significant precipitation of 244 mm (9.6 in) spread over 16 days, accompanied by humidity levels remaining high at 87%. In contrast, June experiences warmer conditions, with minimum temperatures rising to 17°C (63°F) and an average of 26°C (79°F), while still reaching the same maximum of 36°C (98°F). Rainfall increases substantially in June, totaling 407 mm (16.0 in) over 20 days, yet the humidity level remains consistent at 87%. For more details on June weather, check out Haikou weather in June.
May and July exhibit notable differences in weather patterns. May tends to have a milder temperature range with minimums around 11°C (52°F) and maximums peaking at 36°C (97°F), while July shows a warmer profile with minimums of 21°C (70°F) and highs reaching up to 39°C (103°F). Both months experience significant precipitation, with May receiving 244 mm (9.6 in) over 16 days and July slightly higher at 300 mm (11.8 in), with the same number of rainy days. Humidity levels are also elevated in both months, with May averaging 87% and July slightly higher at 91%. For more detailed insights, check out Haikou weather in July.
In May, the weather features a broader temperature range with minimums dropping to 11°C (52°F) and highs reaching up to 36°C (97°F), along with significant rainfall totaling 244 mm (9.6 in) over 16 days. The high humidity of 87% contributes to a muggy atmosphere, making warm days feel even more intense. In contrast, August presents a warmer climate with a higher average temperature of 30°C (86°F) and peak temperatures soaring to 41°C (105°F). Rainfall decreases to 119 mm (4.7 in) over 13 days, while humidity remains consistent at 87%, often resulting in sultry conditions. For more detailed insights, you can visit Haikou weather in August.
May and September showcase distinct weather patterns that reflect the transition of seasons. In May, temperatures range from a mild minimum of 11°C (52°F) to a scorching maximum of 36°C (97°F), averaging 23°C (74°F). This month is characterized by high humidity at 87% and substantial rainfall, with 244 mm (9.6 in) of precipitation spread across 16 days. In contrast, September brings higher average temperatures, with a minimum of 17°C (63°F) and a maximum of 38°C (101°F), averaging 27°C (80°F). This month experiences significantly less rainfall, with only 71 mm (2.8 in) over 9 days and a humidity level of 72%. For a closer look at September’s weather, you can visit Haikou weather in September.
In May, the weather exhibits a vibrant warmth with average temperatures peaking at 23°C (74°F) and a maximum reach of 36°C (97°F). This month sees significant rainfall, with about 244 mm (9.6 in) of precipitation spread over 16 days, resulting in a high humidity level of 87%. In contrast, October brings a slight drop in average temperatures to 21°C (70°F), while still retaining the potential for maximum highs of 36°C (97°F). However, it experiences considerably less rainfall, only about 40 mm (1.6 in) across just 6 days, leading to a lower humidity level of 74%. For a detailed look at the October climate, visit Haikou weather in October.
May and November exhibit significantly different weather patterns. In May, temperatures range from a minimum of 11°C (52°F) to a sweltering maximum of 36°C (97°F), with an average of 23°C (74°F). This month also experiences considerable rainfall, with about 244 mm (9.6 in) over 16 days and high humidity reaching 87%. In contrast, November has a much cooler climate, with temperatures ranging from a chilly 3°C (37°F) to a comfortable 29°C (85°F), averaging 15°C (59°F). Precipitation is also lighter in November, totaling 70 mm (2.8 in) across 10 days, and the humidity drops slightly to 80%. For more specific insights, you can check out Haikou weather in November.
May and December present strikingly different weather conditions. In May, temperatures can range from a minimum of 11°C (52°F) to a scorching maximum of 36°C (97°F), with an average around 23°C (74°F). The month is also characterized by significant rainfall, with 244 mm (9.6 in) of precipitation over 16 days and high humidity at 87%. In contrast, December sees much cooler temperatures, with a minimum of -2°C (28°F) and a maximum of 23°C (74°F), averaging around 9°C (49°F). Precipitation in December is considerably lower at 57 mm (2.2 in) over just 8 days, and humidity decreases to 78%. For more detailed insights into December weather, you can check Haikou weather in December.
As May unfolds in Haikou, the weather transitions into a more tropical character, marked by increased humidity and a noticeable rise in temperatures. With maximums soaring to 36°C, this month feels decidedly warmer compared to the cooler earlier months of the year, while the average temperatures settle around a comfortable 23°C. However, May also brings about a peak in precipitation, with rain gracing the city on about 16 days, making it one of the wetter months. As the landscape transforms under frequent showers, May offers a vibrant mix of sunshine and humidity, paving the way for the lush greenery that characterizes Haikou. For a deeper dive into the city's climatic patterns, check out Haikou Climate.