Changsha weather in September
In September, Changsha has an average high of 30 °C85 °F and an average low of 20 °C68 °F, with about 92 mm3.6 in of precipitation. It is the 4th warmest month of the year and ranks 8th for precipitation.
How September compares with other months
Compared with August, September is 3.3 °C5.9 °F cooler on average and drier by 33 mm1.3 in. Compared with October, September is 5.3 °C9.6 °F warmer on average and wetter by 21 mm0.8 in. Daylight lasts about 12.3 hours around the middle of the month. Average relative humidity is 79% and the average cloud amount 68%.
Is September a good time to visit Changsha?
September is not among the most comfortable months by our comfort score: it is hot (average high 30 °C85 °F), it is fairly wet (92 mm3.6 in) and it is humid (79%). The most comfortable months in Changsha are October.
What to wear in September
For Changsha in September, pack light summer clothes such as T-shirts, shorts or light dresses and an umbrella or light rain jacket.
September in nearby places
Other months in Changsha
- January10 °C50 °F / 1 °C33 °F
- February13 °C56 °F / 4 °C38 °F
- March18 °C65 °F / 8 °C46 °F
- April24 °C75 °F / 13 °C56 °F
- May28 °C82 °F / 18 °C65 °F
- June30 °C86 °F / 22 °C72 °F
- July32 °C90 °F / 25 °C77 °F
- August32 °C90 °F / 24 °C75 °F
- September30 °C85 °F / 20 °C68 °F
- October25 °C77 °F / 14 °C57 °F
- November19 °C66 °F / 8 °C47 °F
- December12 °C54 °F / 2 °C35 °F
Frequently asked questions
How warm is Changsha in September?
In September the average high in Changsha is 30 °C (85 °F) and the average low is 20 °C (68 °F).
Does it rain a lot in Changsha in September?
On average about 92 mm (3.6 in) of precipitation falls in September; it ranks 8th of the 12 months.
Is September the warmest month in Changsha?
No. The warmest month in Changsha is July, with an average high of 32 °C (90 °F). The coldest month is January, with an average low of 1 °C (33 °F).
How long is the day in Changsha in September?
In the middle of September the day in Changsha lasts about 12.3 hours from sunrise to sunset. The value is calculated from the position of the city and the sun.
How humid is Changsha in September?
The average relative humidity in September is about 79%. Combined with warm days, it can feel muggy.
How cloudy is Changsha in September?
On average about 68% of the sky is covered by cloud in September. This is the mean cloud amount from satellite data, not the number of sunny days.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.