Sanya Weather in September
September in Sanya brings very high temperatures around 30°C (86°F) during the day, dropping to 26°C (79°F) at night, and as part of the rainy season, heavy rainfall is common.
Rainfall in Sanya in September
As part of the rainy season, Sanya sees around 18 days of rain in September, with an average of 277 mm (11 in). Showers during the rainy season tend to be heavy and can come down intensely. An umbrella is often not enough, so a poncho or waterproof jacket is a better choice.
Temperature in Sanya in September
September in Sanya sees highs of 30°C (86°F) and lows of 26°C (79°F) overnight. Indoor breaks or shaded spots can make the warmer part of the day much more comfortable. Nights are warm at 26°C (79°F). It's worth making sure your accommodation has decent ventilation or air conditioning.September in Sanya has its charm. However, if you're seeking pleasant, dry and sunny weather, our weather planner can help you explore other destinations in the world.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit China, check out our Sanya's climate page.
Sanya Temperature in September
Min Temperature
26°C (79°F)
Max Temperature
30°C (86°F)
Chance of Rain
59%
Precipitation
277 mm (11 in)
Rainy days
18 days
Humidity
79%
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Sanya typically stay consistent throughout September, with daily highs averaging around 30°C (86°F). Nights are warm, with lows around 25°C (77°F).
Average temperatures in September
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather for Sanya in September
Browse day-by-day weather records for Sanya spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Sanya historical weather extremes in September
Our historical data for Sanya spans 1976 to 2025, revealing these weather extremes.
- The warmest day in September was on September 15, 1978, with a maximum of 38°C (100°F).
- The lowest daytime temperature in September was 25°C (77°F), recorded on September 13, 1978.
- The lowest overnight temperature recorded in September was 19°C (66°F) (September 6, 1980).
Best Places in China in September
Find out more about the weather in China and which places have the best travel conditions in this month. See all of China in September →
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tolerable
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What to Wear in Sanya in September
Warm but pleasant conditions in Sanya in September. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. It's going to pour! Pack a good poncho and prepare for very wet conditions.What To Do in Sanya in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit China, check out our Sanya's climate page.
See the full Sanya climate overview or explore weather in China.
