Ottawa's winters are long and cold, with temperatures often dropping below -30°C in January and February. As spring approaches in March, temperatures slowly rise, fluctuating between freezing and mild days. By April and May, the city is usually pleasant, with average highs reaching 13-20°C. Summer brings warm weather, with July and August being the warmest months, but temperatures rarely exceed 30°C. Autumn returns to a cooler climate, with temperatures dropping again in October and November before the winter chill sets back in.