May · China
Best time to visit Sanya in May Weather, crowds & prices
Weather in Sanya in May
Average temperature 27°C, 229 mm of rain, about 25 days with 6+ hours of sunshine and 83% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
May score
5.9/10
Ranked #7 of 12 months
- Avg temp
- 27°C
- Rainfall
- 229 mm
- Humidity
- 83%
- Days with 6h+ sun
- 25
- Crowd Density
- Quiet / Uncrowded
- Average Expenses
- $ · Budget Friendly ($)
May in Sanya scores 5.9/10 for beach and coastal travel - ranked #7 of 12. Expect around 27°C, 229 mm of rain, and roughly 25 days with 6+ hours of sunshine this month.
Tropical island beach paradise on Hainan Island, China's Hawaii.
May in Sanya: mixed conditions, plan around the weather
May averages 27°C (81°F) and humidity near 83%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
229 mm makes this the wettest stretch of the year, though about 25 days with 6+ hours of sunshine still appear — keep an indoor fallback ready.
It scores 5.9/10 here, 7th of 12 months, against 9.5/10 in the destination's best month.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.
Plan for low-season pricing, with crowds are light for this destination.
Flexible dates? March scores 3.6 points higher here — enough to change the trip.
Frequently asked
- What is the weather like in Sanya in May?
- In May, Sanya averages 27°C, 229 mm of rain, and about 25 days with 6+ hours of sunshine. Its climate-comfort score is 5.9/10.
- Is May a good time to visit Sanya?
- May earns a 5.9/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Sanya in May?
- Expect about 229 mm of rain in May. Average humidity is 83% and there are about 25 days with 6+ hours of sunshine.
Curated in Sanya
Tickets & experiences
Things to do in Sanya
Sanya, China. Live activities and tours from GetYourGuide, matched to this destination.