Rosario's climate is mild throughout the year, with temperatures rarely exceeding 31°C. The coolest months are February and December, with average highs of around 23-25°C. Spring-like conditions prevail in March with warm days averaging 29°C. Summer temperatures peak in May, but only slightly, with a narrow range between 24-29°C. Winters are mild as well, with temperatures fluctuating similarly to the cool months, ranging from 23-29°C.