Barreiras, Brazil has a warm climate year-round. Spring is mild with temperatures gradually increasing from the mid-14°C in May to the mid-20°C by June. Summer months bring hot temperatures, peaking at around 39°C in September and October. Autumn sees a slight cooling trend, with temperatures ranging from 17°C to 33°C from March to November. Winter is essentially non-existent, with no significant drop in temperature throughout the year.