Have you heard of StyleUp? It's a free service that sends you an email each night telling you what to wear the next day, based on the weather where you live.
When you sign up, you put in your zip code and answer a few questions about your style, like whether you work in a more professional or casual office and whether you dress more conservatively or funky. Each night, you get the weather forecast for the next day and a picture of a style- and weather-appropriate outfit that you can put your own spin on.
So simple, but a genius way to make getting dressed in the morning a lot easier. And it's much prettier than the Weather Channel app.
(These images are from my StyleUp recommendations, which is Chicago-weather-based and the "Professional Conservative" style.)