Chengguan experiences a mild spring with temperatures gradually warming up from the low of around 10°C in February to an average of 19°C in March. Summer brings hot and humid conditions, with July being the warmest month, averaging highs around 25-26°C. Autumn is relatively cool and dry, with temperatures ranging from 15-20°C from September to November. Winters are cold and can be quite chilly, with January being the coldest month, averaging lows around 2-3°C.