Over the next 10 days Sanya tops out around 31° (Tuesday) and dips to 24° on the coolest night (Wednesday). Roughly 4.6 in of rain falls over the period, with Monday the most likely wet day (93%). Wind is the one to watch: gusts to 34 mph around Tuesday. Longer view: a tropical climate — warm all year, with the calendar split into wet and dry rather than hot and cold.
Sanya, China · 18.25°N, 109.51°E · Asia/Shanghai · Forecast computed for these exact coordinates