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Haikou Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Haikou.
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Climate overview of Haikou
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, with very warm summers and pleasant winters. September is the wettest month. The sunniest month is July, with 8.3 hours of sunshine per day on average.
Haikou Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Haikou - and find the best time to visit.
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)
Best Time to Visit Haikou
Conditions in Haikou are generally most comfortable in January, February, March, April, November and December. They are typically least comfortable in August and September.
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
Jan
excellent
Feb
excellent
Mar
excellent
Apr
excellent
May
mixed
Jun
mixed
Jul
mixed
Aug
very wet
Sep
very wet
Oct
very good
Nov
excellent
Dec
excellent
- Best overall: January, February, March, April, November and December
- Warmest weather: June, July and August
- Most sunshine: July
- Wettest months: May, June, July, August, September and October, when rainfall is highest.
- Seasonal pattern: A distinct rainy season from July to September, with very warm summers and pleasant winters
Frequently asked questions about the climate in Haikou
What is the best time to visit Haikou?
January, February, March, April, November and December typically offer the most optimal weather in Haikou. In contrast, August and September tend to have less optimal conditions. Haikou has a distinct rainy season from July to September, with very warm summers and pleasant winters.
What temperatures can I expect in Haikou?
Daytime highs range from 21°C (70°F) in January to 32°C (90°F) in July. Nighttime lows range from 17°C (63°F) to 27°C (81°F).
How much rain does Haikou get?
Annual rainfall is around 1411 mm (56 in). September is the wettest month with 238 mm (9.4 in), while January is the driest with 40 mm (1.6 in).
How sunny is Haikou?
Haikou receives around 2,080 hours of sunshine per year. July is the sunniest month with 250 hours, while February is the cloudiest with just 99 hours. Overall, Haikou enjoys abundant sunshine.
Haikou 3-Day Forecast
Haikou on the map
Haikou is highlighted - select any city to see its climate.
Popular in September
Where to go in September - average daytime high across popular destinations.
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