Chengdu is characterized by high humidity year-round, which stems from its location in the heart of the Sichuan Basin and its humid subtropical monsoon climate. The city frequently experiences average relative humidity levels between 75% and 85%, often resulting in a persistent layer of cloud, fog, or mist that limits sunshine hours. During the peak summer months of July and August, this high humidity combines with temperatures reaching 30°C (86°F) to create a muggy, "sauna-like" heat that can feel much hotter than the actual temperature. Conversely, in the winter, the dampness creates a chilly, biting cold that penetrates clothing, even though temperatures rarely drop below freezing. This consistent moisture contributes to the lush greenery of the region but also means that travelers should be prepared for a damp atmosphere regardless of the season.