Weather Smiles is a fairly simple weather app for your Windows Phone that has been recently updated to support Windows Phone 8. Version 2.0 adds multi-sized live tiles, support for all Windows Phone 8 resolutions, and lockscreen support to the mix.
Weather Smiles supports two locations for your weather forecasts, your current location and another that you choose. The app will display the current conditions and a five day forecast for each location. Live tiles will display current conditions (and forecast depending on the size) for each location as well.