Winters in Cluj-Napoca are cold and snowy, with temperatures often dropping below -20°C in January and February. Spring arrives slowly, with temperatures gradually warming up from March to April, but still experiencing chilly nights. Summer is warm and sunny, with temperatures frequently reaching above 30°C in June, July, and August. Autumn brings a return of cooler temperatures, with September being the last month of warm weather before the cold winter sets in. Overall, temperature fluctuations are significant throughout the year, with little consistency from one season to another.