Summer is always an interesting time for Apple (AAPL 0.60%) investors. In June, Apple will host its annual Worldwide Developers Conference in San Francisco, which usually brings at least one or two exciting announcements from the King of Cupertino. So, what's likely in store this year?

Investors and the media have been long speculating on what Apple could have up its sleeve. And although rumors have been swirling in the run-up to the conference, it's now widely expected Apple will use WWDC to unveil its new updates to its iOS and OSX software. What might that entail, and how will that affect Apple investors? In the video below, Fool contributor Andrew Tonner tells investors what they need to know.