Carrot Weather
Years and years ago I designer a weather app called Skyline. Little of it exists on the internet anymore, but the core idea of the app was to present an hourly forecast as a series of icons which would rise and fall with the temperature, giving you an easy-to-read graph of the day ahead. I don’t believe we were the first to ever present a daily forecast this way, we were the first I know of to package a whole app around it.
App developer Carrot recently launched a new version of their Carrot Weather app, which has what I consider the best version of this concept yet, and the best overall weather app I know of for iPhone or iPad (it also runs on newer Macs, though it’s a bit less good there). It’s got good data, presented well, and it looks pretty.