The Forecast is a bare bones weather app for your Windows Phone 8 and 7.x devices. Not much flash with The Forecast but it does provide you with the basic weather information to help you plan you day or week.
The Forecast lays out the weather forecasts across three screen and has Live Tile and Lockscreen support. The app does support multiple locations or you can just let it present the weather based on your current location.
If you're looking for a simple weather app, The Forecast is worth considering.