Winters in Sofia are cold and variable, with temperatures often dropping below freezing, but occasional warmer days can bring temperatures up to around 13°C. Spring is a gradual warming period, with temperatures rising steadily from March's near-freezing averages to April's mild highs of up to 28°C. Summer brings warm to hot temperatures, with July and August averaging around 19°C, although daytime highs can reach as high as 36°C. Autumn is generally mild, with temperatures dropping gradually back towards winter levels, but still remaining relatively moderate until November, when they start to dip again.