During winter they are covered with snow but the climate of the region is arid and the snow disappears during the summer months; only on some high summits like Ojos del Salado and Llullaillaco does ice exist.
During winter, these regions are blanketed with snow, but the local climate is dry, causing the snow to melt during the warmer summer months; however, on certain high peaks like Ojos del Salado and Llullaillaco, ice persists year-round.