Guangzhou weather in September
In September, Guangzhou has an average high of 31 °C87 °F and an average low of 23 °C74 °F, with about 178 mm7.0 in of precipitation. It is the 4th warmest month of the year and ranks 5th for precipitation.
How September compares with other months
Compared with August, September is 1.4 °C2.4 °F cooler on average and drier by 65 mm2.6 in. Compared with October, September is 3.2 °C5.8 °F warmer on average and wetter by 123 mm4.8 in. Daylight lasts about 12.2 hours around the middle of the month. Average relative humidity is 84% and the average cloud amount 63%.
Is September a good time to visit Guangzhou?
September is not among the most comfortable months by our comfort score: it is hot (average high 31 °C87 °F), it is fairly wet (178 mm7.0 in) and it is humid (84%). The most comfortable months in Guangzhou are October–March.
What to wear in September
For Guangzhou in September, pack very light, breathable clothing, a sun hat and plenty of water and an umbrella or light rain jacket.
September in nearby places
Other months in Guangzhou
- January20 °C68 °F / 8 °C47 °F
- February23 °C73 °F / 11 °C52 °F
- March26 °C78 °F / 15 °C58 °F
- April29 °C84 °F / 19 °C66 °F
- May30 °C87 °F / 23 °C73 °F
- June31 °C87 °F / 25 °C77 °F
- July31 °C89 °F / 25 °C77 °F
- August32 °C89 °F / 25 °C77 °F
- September31 °C87 °F / 23 °C74 °F
- October29 °C84 °F / 19 °C66 °F
- November26 °C78 °F / 14 °C58 °F
- December21 °C69 °F / 9 °C48 °F
Frequently asked questions
How warm is Guangzhou in September?
In September the average high in Guangzhou is 31 °C (87 °F) and the average low is 23 °C (74 °F).
Does it rain a lot in Guangzhou in September?
On average about 178 mm (7.0 in) of precipitation falls in September; it ranks 5th of the 12 months.
Is September the warmest month in Guangzhou?
No. The warmest month in Guangzhou is August, with an average high of 32 °C (89 °F). The coldest month is January, with an average low of 8 °C (47 °F).
How long is the day in Guangzhou in September?
In the middle of September the day in Guangzhou lasts about 12.2 hours from sunrise to sunset. The value is calculated from the position of the city and the sun.
How humid is Guangzhou in September?
The average relative humidity in September is about 84%. Combined with warm days, it can feel muggy.
How cloudy is Guangzhou in September?
On average about 63% 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.