Easily, only when you have fast connections. The smallest archives are in the 20 GB kind of range for the English language, and that's without pictures. And good luck finding updated mirrors for the content, or even recent dumps.
Or you could just download the Wikipedia CD. It contains 5500 articles from 2007:
https://en.wikipedia.org/wiki/Wikipedia:Wikipedia_CD_Selecti...
Neither of those two are very up to date of course, but it shows that it can be done.