Diadema, Brazil experiences mild winters with temperatures ranging from 1-4°C in June and July, while summers are warm but not hot, with highs around 27-28°C. Spring and autumn have relatively stable temperatures, with highs in the mid-to-high 20s and lows in the single digits to low teens. The summer months (December to February) bring warmer temperatures, averaging above 22°C, with occasional heatwaves reaching up to 33°C. The coldest month is July, with an average temperature of 15°C.