Sao Caetano do Sul, Brazil has mild winters with temperatures ranging from 2-17°C during the months of June and July. Spring brings slightly warmer days, with temperatures slowly increasing to 20-29°C by April and May. Summer is warm but not scorching hot, with average highs around 28-33°C from December to February. Autumn sees a slight drop in temperature, averaging around 15-23°C from March to November before the cooler winter months return. The city's temperature variation throughout the year is relatively moderate, with minimal extreme fluctuations.