Climate Insights for Sanya

The climate in Sanya is hot. The average annual temperature is 26°C and approximately 1714mm of precipitation falls per year. July is the wettest month, receiving around 359mm 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, July. The coldest months are February, January, December, when temperatures can drop to 20°C.

Sanya has relatively stable temperatures year-round, staying within a 10°C range. The warmest month is June, when average highs reach 30°C and the mean temperature sits around 29°C. February is the coolest month, with minimum temperatures around 20°C and an average of 22°C. Daily temperature variation is modest, with an average difference of 3°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 1714mm of precipitation annually, which averages out to around 143mm per month. The wettest month is July, averaging 359mm of rainfall. August and October also tend to see above-average precipitation. The driest month is December, with just 12mm. That's 347mm 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 relatively calm, with an average annual wind speed of 5km/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 6km/h, though still comfortable for most outdoor activities. The calmest conditions occur in September, with average winds dropping to 3km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 3km/h gap between the calmest and windiest months.

It is currently summer in Sanya, which began on June 21, 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 February near 20°C. Autumn is next, beginning on September 23, 2026 — 91 days from now.

The best time to visit Sanya is during January, February, March and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 23°C with modest rainfall averaging 25mm 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.