I seem to have a weird obsession with weather apps, there's way too many to count on the App Store, but it's great finding the best designed ones, like this one. ClearWeather is a free weather app which simply gives you the current weather and basic info for the next 3 days too. You can add multiple locations and you can make it notify you of the weather for the day. Other than that there is nothing else in the app. It's designed to be simple, if you're looking for detailed info you need to look elsewhere.