Winters in Sibiu are cold, with temperatures often below freezing, averaging around -1°C in January and 0°C in December. Spring brings a slow warming trend, with temperatures rising steadily from April's average of 6°C to May's 12°C. Summer months are warm to hot, with July being the hottest, averaging 20°C, while August is slightly cooler at 19°C. Autumn is mild, with September's average temperature of 13°C gradually cooling down to November's 5°C.