Toronto's winters are long and cold, with temperatures often dropping below -20°C in January and February. As the months progress, temperatures gradually rise, reaching average highs of around 2°C by March, signaling the start of a mild spring. April and May bring warmer days, with temperatures sometimes reaching up to 30°C, but still experiencing cooler nights. Summer is warm and humid, with July and August averaging highs around 20-22°C, while autumn brings a return to milder temperatures, with September and October averaging highs in the mid-teens. By November and December, winter's chill returns, with temperatures dropping again below -10°C.