Cosmopolis, Brazil experiences mild winters and warm summers. The coolest period is in June and July, with average temperatures ranging from 1-17°C, while the coldest month is July with a low of -3°C. Spring starts in September, with temperatures gradually warming up to averages of 24°C by November. Summer months of December, January, and February bring high temperatures, but not excessively hot, with averages around 23-25°C. Autumn sees a slight drop in temperature, but still pleasant, with October being the coolest month before the warm-up towards spring.