Summer in Chengdu (running from June through August) is hot, highly humid, and rainy. Because the city sits in a basin, the air tends to trap moisture, creating a muggy, greenhouse-like effect. Average daytime temperatures hover around 30°C to 33°C (86°F to 91°F), but high humidity can make it feel significantly hotter.
This period is also Chengdu's rainy season. Heavy downpours and sudden thunderstorms are very common, particularly in July and August. While the rain occasionally cools the city down, it usually just adds to the overall dampness.
If you are visiting during the summer, pack light, breathable clothing (like cotton or linen) and always carry an umbrella for both the sun and unexpected rain. Many locals and expats beat the heat by heading to air-conditioned indoor spaces, enjoying iced tea in traditional teahouses, or taking weekend trips to nearby cooler mountain areas like Mount Qingcheng or Mount Emei.