The only thing we have to do to configure the program is to choose our city, the time interval in which 'reload' the background image, and the unit of measure we want to use. Once done, the program will be run in the background.
In the settings menu we'll be able to choose the style and size for the backgrounds.
Weather Desktop Background Changer is an interesting program that, although lacking some functions, can give your desktop a different look.
Windows 7 required.