In Changshu, China, spring brings mild temperatures with a gradual warming trend. March's average temperature of 18 degrees Celsius marks the beginning of a warmer season, with daily highs reaching up to 20 degrees Celsius. The cooler mornings and evenings give way to pleasant afternoons as the days grow longer. Summer months bring hot and humid conditions, with July being the warmest time of year, while autumn is characterized by comfortable temperatures, averaging around 18-22 degrees Celsius in September.