Daejeon's winters are cold and snowy, with temperatures often dropping below freezing in January and December. Spring arrives in March, bringing mild temperatures that gradually warm up through April, which is usually the warmest month of the season. Summers are hot and humid, with July being the hottest month on record. Autumn brings a welcome respite from the heat, with temperatures cooling down significantly by September. Winters return in December, but are not as harsh as those in January, with temperatures gradually warming up again to near-freezing levels.