Winters in Miercurea-Ciuc are harsh and cold, with temperatures often dropping below -20°C in January and February. Spring is a slow and gradual warming process, with temperatures rising from around freezing point in March to mild highs of up to 20°C by April. Summers are warm and pleasant, with July being the hottest month, while August and September experience a slight cooling trend. Autumn brings back cooler temperatures, with October and November averaging around 3-5°C, before dropping again into another cold winter.