Chengdu weather in September
In September, Chengdu has an average high of 27 °C80 °F and an average low of 18 °C64 °F, with about 127 mm5.0 in of precipitation. It is the 5th warmest month of the year and ranks 4th for precipitation.
How September compares with other months
Compared with August, September is 4 °C7.2 °F cooler on average and drier by 74 mm2.9 in. Compared with October, September is 4.9 °C8.8 °F warmer on average and wetter by 68 mm2.7 in. Daylight lasts about 12.3 hours around the middle of the month. Average relative humidity is 78% and the average cloud amount 87%.
Is September a good time to visit Chengdu?
September is not among the most comfortable months by our comfort score: it is fairly wet (127 mm5.0 in) and it is humid (78%). The most comfortable months in Chengdu are March and April and October.
What to wear in September
For Chengdu 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
| Place | High °C°F | Low °C°F | Precip. mmin |
|---|---|---|---|
| Chengdu | 2780 | 1864 | 1275.0 |
| Deyang | 2781 | 1865 | 1275.0 |
| Meishan | 2781 | 1966 | 1435.6 |
| Ziyang | 2882 | 1966 | 1345.3 |
| Mianyang | 2781 | 1967 | 1315.2 |
| Leshan | 2781 | 2067 | 1485.8 |
| Yaan | 2679 | 1966 | 1566.1 |
| Jiangyou | 2679 | 1865 | 1445.7 |
| Suining | 2883 | 1966 | 1355.3 |
Nearby places that are more than 1 °C1.8 °F warmer in September: Leshan and Suining.
Other months in Chengdu
- January11 °C51 °F / 0 °C32 °F
- February14 °C57 °F / 2 °C36 °F
- March20 °C68 °F / 7 °C45 °F
- April25 °C78 °F / 13 °C55 °F
- May29 °C85 °F / 17 °C62 °F
- June32 °C89 °F / 20 °C69 °F
- July32 °C90 °F / 23 °C73 °F
- August31 °C87 °F / 22 °C72 °F
- September27 °C80 °F / 18 °C64 °F
- October22 °C72 °F / 13 °C55 °F
- November17 °C63 °F / 7 °C45 °F
- December11 °C53 °F / 1 °C34 °F
Frequently asked questions
How warm is Chengdu in September?
In September the average high in Chengdu is 27 °C (80 °F) and the average low is 18 °C (64 °F).
Does it rain a lot in Chengdu in September?
On average about 127 mm (5.0 in) of precipitation falls in September; it ranks 4th of the 12 months.
Is September the warmest month in Chengdu?
No. The warmest month in Chengdu is July, with an average high of 32 °C (90 °F). The coldest month is January, with an average low of 0 °C (32 °F).
How long is the day in Chengdu in September?
In the middle of September the day in Chengdu 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 Chengdu in September?
The average relative humidity in September is about 78%. Combined with warm days, it can feel muggy.
How cloudy is Chengdu in September?
On average about 87% 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.