Huaiyin experiences mild springs with temperatures gradually warming up, starting around 10°C in February and reaching a high of 22°C by April. Summer months bring sweltering heat, with June being the hottest at an average temperature of 29°C. Autumn is warm but relatively dry, with September averaging 18°C. Winters are cool to mild, with temperatures ranging from 2°C in January to 8°C in March, before warming up further.