Montreal's winters are harsh and cold, with temperatures often dropping below -20°C in January and February, but slowly warming up by March. Spring arrives around April, bringing mild temperatures ranging from 0-24°C, with May marking a significant warm-up to average highs of 14°C. Summer is pleasant, with temperatures consistently above 15°C from June to August, reaching highs of 30-35°C in July and August. Autumn is relatively cool, with September being the warmest month, followed by a gradual cooling down in October and November. Winters return by December, bringing icy temperatures again.