Spring (March-May): Mild temperatures (15-25°C), blooming flowers, and pleasant weather make spring ideal. The city hosts flower festivals during this period. Days are longer and rain is moderate.
Autumn (September-November): Cool temperatures (15-25°C), clear skies, and lower humidity create perfect conditions. This is peak tourist season with excellent visibility for outdoor activities. Mountain day trips are especially rewarding.
Summer (June-August): Hot and humid (25-35°C) with frequent rain. However, fewer tourists visit during this period, allowing easier access to attractions. Air-conditioned venues are essential.
Winter (December-February): Cool and grey (5-15°C) with occasional frost. The city experiences fog and limited sunshine. Heating is limited in many venues, making comfort challenging. Less ideal for outdoor exploration.
Seasonal Considerations: Chengdu's humidity is notably high year-round due to the Sichuan basin geography. The city averages 200+ rainy days annually, so rain gear is always recommended.