May weather forecast
Sanya, China

May marks the onset of summer in Sanya, featuring distinctive weather traits, making it easily recognizable. It escalates dramatically from the 43mm (1.69") precipitation in April to 142mm (5.59"), making it one of the wettest months in Sanya. Daylight extends into longer periods, enabling tourists to enjoy more daylight hours. The city takes on a summery glow, characterized by hot temperatures, longer days, and increasing humidity. These definable changes in May weather establish the city's transition into full summer.

Temperature

With average high temperatures of 32°C (89.6°F) and lows of 25.6°C (78.1°F), May is the warmest month.

Rainfall

In Sanya, in May, it is raining for 10 days, with typically 142mm (5.59") of accumulated precipitation. Throughout the year, there are 111.1 rainfall days, and 1392mm (54.8") of precipitation is accumulated.

Sea temperature

In Sanya, the average seawater temperature in May is 28.9°C (84°F).
Note: Water activities including swimming and diving are pleasurable in temperatures between 25°C (77°F) and 29°C (84.2°F), ensuring comfort and enjoyment for extended time frames.

Daylight

In May, the average length of the day in Sanya is 12h and 59min.
On the first day of May, sunrise is at 06:14 and sunset at 19:03. On the last day of the month, sunrise is at 06:05 and sunset at 19:14 CST.

Sunshine

May and July, with an average of 7h of sunshine, are months with the most sunshine.

UV index

March through September, with an average maximum UV index of 12, are months with the highest UV index. A UV Index value of 11, and more, symbolizes an extreme threat to health from exposure to the Sun's UV rays for average individuals.
Note: In May, a regular UV index of 12 translates into these guidelines:
Take all necessary precautions, as unprotected skin can burn in minutes. Seek shade and limit direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Keep in mind that shade structures like parasols or canopies do not offer complete sun protection. During bright days, sunglasses that offer UVA and UVB defense are recommended. Apply generously and frequently a broad-spectrum SPF 30+ sunscreen every two hours, or immediately after swimming or any outdoor exercise. Stay vigilant! UV rays get a boost in intensity due to sand and water reflections.