Haikou Weather in May
Haikou in May sees very high temperatures, with highs around 31°C (88°F) and overnight lows of 26°C (79°F). Rainfall is fairly high at around 132 mm (5.2 in) on average, so pack waterproofs just in case.
Rainfall in Haikou in May
Rain is expected on roughly 16 days, totalling around 132 mm (5.2 in) for the month. This is a wet month with frequent and often heavy showers. Both the number of rain days and the total rainfall are high.
Temperature in Haikou in May
May in Haikou brings very high temperatures, with highs of 31°C (88°F) and nights around 26°C (79°F). If you're spending a lot of time outdoors, it helps to plan around the warmer part of the day. At 26°C (79°F) overnight, it stays warm after dark. Light, breathable clothing and good airflow in your room make a noticeable difference.
Sunshine in Haikou in May
With approximately 220 hours of sunshine, the days are filled with clear skies. It makes it a perfect month for being outside.
Wind Speed in Haikou in May
Average wind conditions reach 2 m/s (4 knots) in May. This creates comfortable weather with light winds that gently move vegetation. Keep in mind this is an average. Daily conditions range from near-calm to more noticeable wind.If you prefer dry days with pleasant temperatures, January, February, March, April, November and December typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit China, check out our Haikou's climate page.
Haikou Temperature in May
Min Temperature
26°C (79°F)
Max Temperature
31°C (88°F)
Chance of Rain
52%
Precipitation
132 mm (5.2 in)
Rainy days
16 days
Humidity
81%
Windspeed
2 m/s (4 knots)
Sunshine
220 hours
Percentage Sunshine
54%
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Haikou typically stay consistent throughout May, with daily highs averaging around 31°C (88°F). Nights are warm, with lows around 25°C (77°F).
Average temperatures in May
Historical weather for Haikou in May
Browse day-by-day weather records for Haikou spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Haikou historical weather extremes in May
Based on weather observations in Haikou between 1976 and 2025, these are the recorded extremes during May.
- The hottest May day on record in Haikou reached 40°C (104°F) (May 21, 1988).
- Haikou experienced its chilliest May day on May 2, 2022, reaching only 21°C (70°F).
- The coldest night in May in Haikou was on May 7, 1984, with a minimum of 17°C (63°F).
Best Places in China in May
Find out more about the weather in China and which places have the best travel conditions in this month. See all of China in May →
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tolerable
unpleasant
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What to Wear in Haikou in May
Warm weather calls for comfortable, breathable clothing in May. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). High rain levels are expected, so pack waterproof gear and an umbrella or poncho. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.What To Do in Haikou in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit China, check out our Haikou's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed
See the full Haikou climate overview or explore weather in China.
