Monza's winters are chilly, with temperatures often below freezing and averaging around 1°C in January. Spring brings a steady warming trend, with March and April temperatures rising towards the mid-teens. Summer is warm, but not hot, with July and August highs rarely exceeding 33°C, and averages around 20°C. Autumn is mild, with September's warmth giving way to cooler temperatures by October. By December, winter has returned, with temperatures plummeting back below freezing, averaging around 3°C.