December · China
Best time to visit Sanya in December Weather, crowds & prices
Weather in Sanya in December
Average temperature 19°C, 28 mm of rain, about 9 days with 6+ hours of sunshine and 84% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
December score
7.0/10
Ranked #5 of 12 months
- Avg temp
- 19°C
- Rainfall
- 28 mm
- Humidity
- 84%
- Days with 6h+ sun
- 9
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$ · Moderate Cost ($$)
December in Sanya scores 7.0/10 for beach and coastal travel - an above-average month (#5 of 12). Expect around 19°C, 28 mm of rain, and roughly 9 days with 6+ hours of sunshine this month.
Tropical island beach paradise on Hainan Island, China's Hawaii.
December in Sanya — reliably good (5th best month)
December averages 19°C (67°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
Expect 28 mm of rain — occasional showers rather than washed-out days — alongside about 9 days with 6+ hours of sunshine and 10.9 daylight hours.
It scores 7/10 here, 5th of 12 months, against 9.5/10 in the destination's best month.
Pack light clothing, swimwear and real sun protection.
Plan for mid-season pricing, with crowds are moderate.
Flexible dates? March scores 2.5 points higher here — enough to change the trip.
Frequently asked
- What is the weather like in Sanya in December?
- In December, Sanya averages 19°C, 28 mm of rain, and about 9 days with 6+ hours of sunshine. Its climate-comfort score is 7.0/10.
- Is December a good time to visit Sanya?
- December earns a 7.0/10 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 December?
- Expect about 28 mm of rain in December. Average humidity is 84% and there are about 9 days with 6+ hours of sunshine.
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