Haikou Temperatures: Monthly Averages and Year-Round Insights
On this page, we’ll explore temperature statistics for Haikou in Hainan, China, including day and night variations and monthly averages. We’ll also compare the annual temperature to other cities in China.
Monthly Temperature Averages
Haikou sees moderate fluctuations in temperatures, making each season distinct yet not extreme. Average maximum daytime temperatures reach a very warm 32°C in July. In January, the coolest month of the year, temperatures drop to a pleasant 21°C. At night, minimum temperatures can drop even lower, averaging around 17°C.
The chart below illustrates the average maximum day and minimum night temperatures in Haikou by month:
The minimum temperature is often recorded between 4 AM and 6 AM, while the highest temperature is usually reached at 3 PM. During this time the sun's heating effect is the strongest. July, the city’s warmest month receives 250 hours of sunshine.
The chart below shows the average temperature throughout the year:
January, the city’s coldest month, sees about 40 mm of rainfall spread over roughly 12 days. It records 110 hours of sunshine of sunshine.
Annual Temperatures in China Compared
The map below shows the annual temperature across China. You can also select the different months in case you are interested in a specific month.






Haikou Temperatures Compared World Wide
Haikou’s average annual maximum temperature is 28°C. Let’s compare this with some popular tourist destinations:
Seville, Spain, stands out with its warm Mediterranean climate and an average annual temperature of 23°C.
In contrast, in Oslo, Norway, the average annual temperature is significantly lower at 10°C, with mild summers and cold winters.
Osaka, Japan, offers a similar climate to Tokyo, with an average annual temperature of 22°C.
Perth, Australia, experiences a Mediterranean climate, with a pleasant average temperature of 25°C.
How does the temperature feel?
Humidity is an essential factor in how you experience temperature. When a warm period is accompanied by high humidity, it results in a higher perceived temperature. This is especially true when temperatures exceed 25°C, as it can cause greater discomfort.
In Haikou, during the coolest month, January, you will experience 84% humidity, which is considered very high. This is accompanied by an average maximum temperature of 21°C. In the warmest month, July, the humidity is 80% combined with an average maximum temperature of 32°C, which creates a very high-feel temperature. Explore our detailed page on humidity levels for further details.
How are these Temperatures Measured?
Generally, temperature data depicting climate is usually given over a 30-year average in order to reduce short-term fluctuations and reveal better long-term trends in climate conditions.
This temperature data is taken from land-based thermometers, ocean buoys, ships, and satellites. These measurements are transmitted to weather stations and climate centers around the globe where they are processed, averaged, and analyzed in order to monitor the trends and create climate models.
Sea vs. Land Temperatures
The influence of nearby oceans or large water bodies significantly affects local temperatures:
- Ocean Influence: Coastal regions tend to have more stable temperatures, as large bodies of water absorb and release heat slowly. This often results in milder winters and cooler summers compared to inland areas.
- Continental Climates: Landmasses well away from large bodies of water tend to show greater extremes in temperature, having hotter summers and colder winters because of the absence of water as a moderating influence.
For more detailed information about Haikou’s weather, including monthly rainfall, sunshine hours, and humidity levels, visit our Haikou climate page.