The temperature in Cangshan is several degrees lower than that in the ancient city.

About 3℃ lower. With every increase of 100 m, the average temperature will drop by about 0.6℃. Take the urban area of Wuxi as an example, its altitude is about 10-20m. In the same weather, the temperature in Cangshan may be about 3℃ lower than that in the urban area, but in fact, the meteorological changes are very complicated. According to the difference of season and climate, the temperature difference between Cangshan and the ancient city may be different. Cangshan is located in a high altitude area, and its surrounding environment is relatively fresh, lacking various factors such as heat sources and pollutants in the process of urbanization. These factors add up to a low temperature in Cangshan, which may be several degrees or even more lower than that in the ancient city.