After upgrading my iPad 4 to iOS 7, I don't see the weather forecast in the new Notification Center. The calendar is there, and the bottom of the Notification Center has the Yahoo! copyright info for the weather data, but the weather information is not displayed.
Wi-fi is turned on, but I have the location services disabled. When turning on location services, the weather info is shown. What's strange is that on my wife's iPad, the weather info is shown even with location services disabled. Both of our iPads are Wi-fi only, no 3G.
Are you seeing the same behavior? What could be causing this inconsistency?