Climate Insights for Sanya

The climate in Sanya is hot. The average annual temperature is 25°C and approximately 1565mm of precipitation falls per year. July is the wettest month, receiving around 306mm of rainfall. Sanya is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: June, August, May. The coldest months are January, February, December, when temperatures can drop to 19°C.

Sanya sees moderate temperature variation throughout the year, ranging from 19°C to 30°C. The warmest month is June, when average highs reach 30°C and the mean temperature sits around 29°C. January is the coolest month, with minimum temperatures around 19°C and an average of 21°C. Daily temperature variation is modest, with an average difference of 4°C between highs and lows. The sharpest temperature change occurs between November and December, with a 3°C shift in average temperatures.

Sanya is a fairly wet location, receiving approximately 1565mm of precipitation annually, which averages out to around 130mm per month. The wettest month is July, averaging 306mm of rainfall. August and October also tend to see above-average precipitation. The driest month is December, with just 11mm. That's 295mm less than July, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.

Sanya is mildly breezy, with an average annual wind speed of 19km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is December, averaging 22km/h, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in May, with average winds dropping to 15km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 7km/h gap between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 21km/h in winter, 16km/h in spring, 18km/h in summer, 20km/h in autumn.

It is currently spring in Sanya, which began on March 20, 2026. Sanya is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in June at around 30°C, while the coldest stretch bottoms out in January near 19°C. Summer is next, beginning on June 21, 2026 — 88 days from now.

The best time to visit Sanya is during January, February, March, November and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 23°C with modest rainfall averaging 22mm per month. By contrast, June can be uncomfortably hot with temperatures reaching 30°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for Sanya based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.