Sihui's winters are mild, with temperatures ranging from 2-26°C in January and 6-27°C in December, making it a relatively comfortable time of year. Spring arrives in March, bringing warmer temperatures that gradually increase throughout the season, peaking at 33-34°C in April and May. Summer is hot and humid, with temperatures often reaching 37-40°C from June to August. Autumn sees a return to milder weather, with temperatures dropping back down to 14-36°C by October, before cooling further into winter once again.