Taking the local weather in Mariano Acosta into account can help you maximise your time at the pool during your trip. The hottest months are usually September and October, with an average temperature of 13°C, while the coldest months are August and July, with an average of 13°C. The rainiest months in Mariano Acosta are April, November, March and February, with each month seeing an average of 280 mm of rainfall.