iOS Pick: Sunshine
Leo Laporte's app cap on iOS Today 267 is the Sunshine weather app. It's hyperlocal weather, and it actually gets the barometric pressure from a sensor in your phone. It also lets you report what the weather is doing at your exact location so other people can find it. It's kind of like Waze, but for weather.
Sunshine has a slider for moving forward in time, so you can see what the weather will be like for the next 24 hours. It'll send you a daily summary with notifications. You also can tell it what your temperature comfort zone is, and get community alerts for weather changes.