Haikou Weather & Climate: Best Time to Visit
Temperatures in Haikou, Hainan, China, shift moderately through the seasons. The warmest month is July at 32°C (90°F), and the coolest is January at 21°C (70°F).
The city has a wet climate, receiving around 1411 mm (56 in) of rainfall per year. Despite the high annual total, it has a distinct rainy season from July to September. September is the wettest month. The sunniest month is July, with 8.3 hours of sunshine per day on average.
Monthly Temperature in Haikou
The weather in Haikou changes moderately throughout the year, offering enough variation to appreciate each season. On average, daytime temperatures range from a very warm 32°C (90°F) in July to a pleasant 21°C (70°F) in January.
Nighttime temperatures range from 27°C (81°F) in July to 17°C (63°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Haikou
Haikou has a notably wet climate with abundant precipitation, recording 1411 mm (56 in) of rainfall per year. The seasons in Haikou bring significant changes in precipitation. The wettest month, September, receives heavy rainfall, with an average of 238 mm (9.4 in) of precipitation. This rainfall is distributed across 17 rainy days.
In contrast, the driest month, January, experiences much less rainfall, totaling 40 mm (1.6 in) over 12 rainy days. These distinct seasonal differences provide diverse experiences throughout the year. For more details, please visit our Haikou Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Haikou
In Haikou, summer days are longer and more sunny, with daily sunshine hours peaking at 8.3 hours in July. As the darker season arrives, the brightness of the sun becomes less. February sees a soft sun for only 3.3 hours per average day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Humidity in Haikou by Month
The city experiences its highest humidity in February, reaching 87%. In October, the humidity drops to its lowest level at 79%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Wind Speed in Haikou
The mean wind speed varies between 2 m/s (4 knots) and 3 m/s (6 knots) throughout the year. It is lowest in May, June, July, August, September, October and December and highest during January, February, March, April and November. What does this mean?
The mean monthly wind speed over the year (meters per second)
Haikou 3-Day Forecast
Check the conditions for any month of the year.
Best Time to Visit Haikou
Haikou's weather is most enjoyable during January, February, March, April, November and December, with comfortable temperatures from 21°C (71°F) to 28°C (83°F). The moderate conditions ensure pleasant weather for exploring the area. Expect varied weather during this period with rainfall between 40 mm (1.6 in) and 79 mm (3.1 in), providing a good balance of sunny and rainy days.The wettest months are July, August, September and October, when precipitation is at its highest. Seeking the perfect travel destination for this year? We've created a tool that suggests locations matching your desired weather. Let our weather planner guide your travel decisions.
