Chicago's winters are harsh and cold, with temperatures often plummeting below freezing in January and February, averaging around -1°C and -6°C respectively. Spring arrives slowly, bringing mild temperatures that gradually warm up by March, with average highs reaching a comfortable 10°C. Summer months of June to August bring warm and humid weather, with temperatures consistently above 20°C, peaking at 24°C in July and August. Autumn is cooler and more pleasant, with September and October experiencing gentle temperature fluctuations between 11°C and 21°C. Winters return by December, bringing chilly temperatures averaging around 4°C, while November's temperatures are a mixed bag of cold snaps and mild days.