Weather Smiles is the only Live Tile weather app that has two locations on one tile. Version 2.0 adds Windows Phone 8 support with multi-size tiles, lockscreen notification with current temperature and all windows phone 8 screen resolutions supported.
With Weather Smiles you can set 2 locations to be displayed on your tile, current and an additional location of your choice, or you can set both locations to your liking. Each live tile size displays current temperature and current conditions depending on the live tile size.
With lockscreen notifcation, you can set Weather Smiles as a lockscreen notification and it will display the temperature of the current location.
Weather Smiles is currently $1.29 with trial available and the price will be going up to $1.99 again soon.
Weather Smiles can be downloaded at http://bit.ly/MIWQtv