August is one of the hottest months in Nanjing, and the extreme heat smothers the city. The maximum temperature is 32 °C (90 °F) and the minimum temperature is 24 °C (75 °F). Summer clothing is still suitable, but also bring a long-sleeve shirt for the coolness that the rains bring. When you go out, wear a hat and a pair of sunglass to protect yourself from the sun.
Despite Nanjing being called a "heating stove" (because of the extremely hot weather) during July and August the grasslands are growing, which helps ease the heat. Many tourists come to Nanjing for sightseeing during the hottest months so if you are planning to visit Nanjing in August, book in advance.