Bing Weather and Weather Channel apps are inaccurate at most of the time and live tile rarely if ever works. Accuweather is a alternative but the app doesn't work anymore for some devices (
New update killed it for me. Tile updates but in app is broken). I would recommend if the problem is not fixed via better connection to the internet( wifi hotspot area or cellular data 24/7) or re-installing it, get the app weather bug. It's super accurate and it has multiply weather stations in cities to get the best estimate of your weather around you. One warning, its takes a lot of data to update the tile due to its accuracy and features. So far, weather bug has no problems.