Changchun's winters are harsh and cold, with temperatures often dropping below -20°C in January and February. Spring arrives in March, bringing mild temperatures ranging from -5°C to 17°C, but it can still be quite chilly. Summer is warm and humid, with July being the hottest month, averaging around 26°C, while August and September experience a slight cooldown. Autumn brings cooler temperatures again, with October averaging around 8°C, before winter returns in December, bringing cold temperatures once more.