Complex sentence: The temperate valleys, the location of major cities such as Salta and Jujuy, have an average precipitation ranging between, with rainfall mainly concentrated in the summer months, often falling in short but heavy bursts.
Split into simpler sentences: The temperate valleys, which include major cities such as Salta and Jujuy, have an average precipitation ranging between. Rainfall in the temperate valleys is mainly concentrated in the summer months and falls in short but heavy bursts.