cPanel includes powerful visitor statistic tracking options; Awstats, Analog and Webalizer. Perhaps the most feature rich option is Awstats and to use it simply:

1. Login to cPanel.
2. Click the Awstats icon.
3. If required, select the domain you wish to view the statistics for.
4. This will then show you the statistics for the latest period.

At the top of the page showing the statistics you can adjust the reporting period to see information for previous months.