Quilmes experiences mild winters, with temperatures ranging from -3°C in June and July to 4°C in September. Spring brings warming temperatures, with highs reaching up to 36°C in January and October, but also drops to as low as 0°C in May. Summer months are hot, with temperatures often above 30°C from November to February, while autumn sees a gradual cooling trend. The warmest month is December, with an average temperature of 24°C, while the coolest month is June, averaging 11°C.