Santiago de Cuba's climate is characterized by warm temperatures throughout the year, with average highs consistently above 25°C. The summer months of June to August bring peak temperatures, often reaching as high as 36°C in July and August. Spring and autumn have slightly lower highs, but still pleasant temperatures, while winter months from December to February are the coolest, though still mild. Overall, temperature fluctuations throughout the year are relatively minor, with average highs rarely dipping below 19°C or exceeding 35°C. The heat index remains high for most of the year, making it a tropical climate.