Hainan Rainfall & Precipitation: Monthly Averages and Year-Round Insights

This page shows the average amount of rainfall per month in Hainan. The numbers are calculated over a 30-year period to provide a reliable average. Now, let’s break down all the details for a clearer picture.

On average, Hainan receives a reasonable amount of rain/snowfall, with an annual precipitation of 507 mm.

Monthly Precipitation Levels

The average number of days each month with precipitation (> 0.2 mm)

The seasons in Hainan, bring significant changes in precipitation. The wettest month, July, receives high rainfall, with an average of 111 mm of precipitation.

This rainfall is distributed across 16 rainy days. In contrast, the driest month, December, experiences much less snowfall, totaling 3.8 mm over a single snowy day. These distinct seasonal differences provide diverse experiences throughout the year.

July, the city’s wettest month, has a maximum daytime temperature of 21°C. During the driest month December you can expect a temperature of 1°C. For more detailed insights into the city’s temperatures, visit our Hainan Temperature page.

Annual Precipitation in China

The map below shows the annual precipitation across China. You can also select the different months in case you are interested in a specific month.

Amsterdam Precipitation Compared World Wide

Hainan’s average annual precipitation is 507 mm. Let’s compare this to some popular worldwide tourist destinations:

Seville, Spain, experiences 541 mm of rainfall annually, with wet winters and dry summers typical of southern Spain.

In Shanghai, China, the annual average precipitation is 1347 mm, with a humid subtropical climate.

Perth, Australia, receives 565 mm of rainfall annually, mostly during the winter months.

Singapore, situated near the equator, gets 2581 mm of rainfall annually, with no distinct dry season and consistent monthly precipitation.

How is Precipitation Measured?

Precipitation amounts are measured using specific gauges installed at weather stations, collecting both rain and snow and any other type of precipitation. Rainfall is measured directly in millimeters, while that from snow and ice is obtained by melting it. Automated systems often incorporate heaters to make this easier.

Information from these stations is transmitted via Wi-Fi, satellite, GPS, or telephone connections to central monitoring networks. This information is immediately updated and integrated into weather models and forecasts.

Sea vs. Land Precipitation

The proximity of a location to a large body of water can significantly affect its rainfall patterns:

• Ocean Influence: Coastal regions typically receive more rainfall due to the presence of moisture-laden winds from the ocean. These regions tend to have more humid climates and experience more frequent precipitation, especially in winter.
• Continental Climates: Areas further from the sea, such as inland or continental regions, experience less frequent rainfall and more extreme seasonal variations in precipitation.

For more detailed information about Hainan’s weather, including sunshine hours, humidity levels, and temperature data, visit our Hainan Climate page.