I have added a user settings dialog below your id on your main page. The main thing that lets you do right now is change your weather station and your units.
Click on the little icon with guy holding the pencil there to bring it up. You have to be logged in to see it, of course. Your home timezone currently isn't used anywhere, but I'll need it for the weekly, monthly and yearly summary pages so I can end the periods correctly based on your timezone, so make sure it is set correctly for you.