Now you can control the time aggregation on AdWords charts to show data by day, week, month, or quarter. This let's you see trends clearer than you would by just looking at the data by day.
Today, we’re making it easier and faster to get a customized view of how your performance is trending with a new button right above your chart in AdWords that lets you toggle between Daily, Weekly, Monthly, or Quarterly data (shown below). We hope this will save you time and make you more efficient while optimizing your search campaigns.
Here is a picture of the options:
Here is a picture of the before and after:
Forum discussion at Google+.