When you're dreaming of a stay in Tarapacá, make sure that you take the year-round temperatures into account. The hottest months are usually September and October, with an average temperature of 26°C, while the coldest months are July and June, with an average of 25°C. The rainiest months in Tarapacá are March, January, February and April, with each month seeing an average of 413 mm of rainfall.