In May, Chengdu transitions into the beginning of summer, experiencing warm and increasingly humid conditions with average daytime high temperatures ranging from 26°C to 32°C (79°F to 90°F) and nighttime lows typically between 15°C and 21°C (59°F to 70°F). While the weather is generally pleasant for outdoor activities, it is characterized by high cloud cover and the start of the rainy season, with an average of 15 rainy days resulting in approximately 79 mm of precipitation, often occurring as brief, light-to-moderate showers or misty drizzles. Travelers should prepare for a range of temperatures by packing lightweight clothing like short sleeves for the daytime, a light jacket or sweater for cooler evenings and rainy days, and essential items such as an umbrella, sunscreen, and comfortable walking shoes. Because pandas become less active as temperatures rise above 26°C (79°F), it is highly recommended to visit the Chengdu Research Base of Giant Panda Breeding shortly after it opens at 7:30 AM to see them during their morning feeding before they move indoors to escape the heat.