Located in the bordering areas of the Sichuan northwest highland and the Sichuan basin, Chengdu is mountainous in the northwest area, with plains in the southeast area, and low hills in-between. 

 

The climate in Chengdu is quite temperate. The weather is nice during the winter, with lows of about 40 degrees Fahrenheit (=4.4 degrees Celsius) and highs of around 55 degrees Fahrenheit (=12.8 degrees Celsius).  With the combination of humidity and surrounding mountains, Chengdu is almost always overcast. The best time to visit is between March and June or between September and November.

 

During the whole of September, here is the detailed information in Chengdu. The average maximum temperature is 79 degrees Fahrenheit (=26 degrees Celsius)℃, the average minimum temperature is 66 degrees Fahrenheit (= 19 degrees Celsius), and the average rainfall for the month is 120mm.