Ouro Preto's climate is characterized by mild winters and warm summers. Winters, from June to August, are cool with average temperatures ranging from 5-19°C, while springs bring a gradual warming trend, with March and April averages peaking at 23°C. Summers are hot and humid, especially in September and October, when highs can reach up to 36°C. Autumns are mild, with November and December temperatures averaging around 21°C. Overall, the temperature fluctuations throughout the year are moderate, with a slight cooling trend from January to May.