Hainan Weather by Month — Temperature & Rainfall Guide

Hainan is a region in China. Many people wonder what the weather conditions are in Hainan over the year. What is the best time to visit Hainan?

This page shows the average weather conditions by month in Hainan over the year in: January, February, March, April, May, June, July, August, September, October, November, December.

In January the weather in Hainan is generally perfect. The temperatures range from pleasant in Haikou with 21°C (70°F) to high in Sanya with 24°C (75°F). On average, this month is the coldest month of the year in Hainan.

Find more detailed climate information for Hainan in January here.

In February the weather in Hainan is generally perfect. The average maximum daytime temperatures are high and range from 23°C (73°F) in Haikou to 26°C (79°F) in Danzhou.

Find more detailed climate information for Hainan in February here.

In March the weather in Hainan is generally perfect. The average maximum daytime temperatures are high and range from 25°C (77°F) in Haikou to 29°C (84°F) in Danzhou.

Find more detailed climate information for Hainan in March here.

In April the weather in Hainan ranges from tolerable in Danzhou to perfect in Sanya. The temperatures range from high in Wanning with 28°C (82°F) to very high in Danzhou with 32°C (90°F).

Find more detailed climate information for Hainan in April here.

In May the weather in Hainan ranges from poor in Wenchang to tolerable in Sanya. The average maximum daytime temperatures are very high and range from 30°C (86°F) in Lingshui to 33°C (91°F) in Danzhou. These night and day temperatures are an average and some days may be even warmer. So be prepared and bring light clothes.

Find more detailed climate information for Hainan in May here.

In June the weather in Hainan ranges from poor in Sanya to tolerable in Haikou. The average maximum daytime temperatures are very high and range from 31°C (88°F) in Lingshui to 34°C (93°F) in Danzhou. On average, this month is one of the warmest months of the year in Hainan. So be prepared and make sure to dress lightly.

Find more detailed climate information for Hainan in June here.

In July the weather in Hainan ranges from poor in Sanya to tolerable in Haikou. The average maximum daytime temperatures are very high and range from 31°C (88°F) in Lingshui to 34°C (93°F) in Danzhou. These night and day temperatures are an average and some days may be even warmer. So be prepared and bring light clothes.

Find more detailed climate information for Hainan in July here.

In August the weather in Hainan ranges from poor in Sanya to unpleasant in Wanning. The average maximum daytime temperatures are very high and range from 31°C (88°F) in Sanya to 33°C (91°F) in Wenchang. These night and day temperatures are an average and some days may be even warmer. So be prepared and bring light clothes.

Find more detailed climate information for Hainan in August here.

In September the weather in Hainan is generally poor. In Sanya you can expect very warm maximum average daytime temperatures around 30°C (86°F) and nighttime temperatures around 26°C (79°F). These night and day temperatures are an average and some days may be even warmer. So be prepared and bring light clothes.

Find more detailed climate information for Hainan in September here.

In October the weather in Hainan ranges from poor in Qionghai to pleasant in Haikou. In Sanya you can expect warm maximum average daytime temperatures around 29°C (84°F) and nighttime temperatures around 24°C (75°F). These night and day temperatures are an average and some days may be even warmer. So be prepared and bring light clothes.

Find more detailed climate information for Hainan in October here.

In November the weather in Hainan ranges from pleasant in Wanning to perfect in Sanya. In Sanya you can expect warm maximum average daytime temperatures around 28°C (82°F) and nighttime temperatures around 22°C (72°F).

Find more detailed climate information for Hainan in November here.

In December the weather in Hainan is generally perfect. The average maximum daytime temperatures are high and range from 23°C (73°F) in Haikou to 25°C (77°F) in Sanya.

Find more detailed climate information for Hainan in December here.