Warm
Average highs sit around 31°C, giving warm days by monthly-average standards.
September verdict
Sanya, Hainan, China in September
Weather score52Mixed
Mixed for holiday weather
Average highs sit around 31°C, giving warm days by monthly-average standards. Sunshine averages 6.2h per day, enough for a balanced month. Rainfall averages 287mm, so showers are a real planning factor.
September weather
Monthly averages
Temp
31°C
Rain
287mm
Sun
6.2h
Sea
29°C
Weather score
52
Mixed
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Wet
Rainfall averages 287mm, so showers are a real planning factor.
Some sun
Sunshine averages 6.2h per day, enough for a balanced month.
Warm sea
Sea temperatures average 29°C, so swimming is usually comfortable by monthly-average standards.
Map
Weather map
Compare Sanya, Hainan, China with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September31°C average high
September sits in the warmer part of the year, so midday sightseeing can feel heavier than in cooler months.
Warmest monthsApril to September
This stretch sets the upper range for average daytime heat.
Rain
September287mm average rain
September is one of Sanya's wettest months, so rain is likely to be a major planning factor.
Driest monthsJanuary to April and November to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
September6.2 hours average sun
September sits close to Sanya's yearly sunshine average, so it is a middle-of-the-pack month for bright days.
Brightest monthsMay to July and September
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
September29°C average sea
September is one of Sanya's warmest sea months, when swimming comfort is usually strongest.
Warmest seaMay to October
Sea temperatures are usually near 28°C in this stretch, so swimming comfort is at its strongest.
Weather score
September52 weather score
September is one of the weakest weather-score months, when the overall mix is less favourable than the rest of the year.
Best weather monthsJanuary to April and November to December
These months have the strongest weather score in the monthly averages.
Hotels in Sanya, Hainan, China
Marriott
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The Ritz-Carlton, Sanya Yalong BaySanya, Hainan, China
The St. Regis Sanya Yalong Bay ResortSanya, Hainan, China
JW Marriott Hotel Sanya Dadonghai BaySanya, Hainan, China
JW Marriott Sanya Haitang Bay Resort & SpaSanya, Hainan, China
The Sanya EDITIONSanya, Hainan, China
Sanya Marriott Yalong Bay Resort & SpaSanya, Hainan, China