Are there any sites out there that teach you how to read charts like; Significant Weather Prognostic Charts, Surface Analysis, Upper Air Analysis, etc. Pretty much those charts on the Nav Canada aviation website.

Don't know of any websites, but the AIM has a good descriptive section.

ST

In case you missed it (and don't worry, many students do) try the Tips link on the top-right of the NavCan weather page. It won't teach you all about those reports, but it provides a good basic description of what's there for each one.