Apple appears to have ceased using data from Yahoo for its Weather app in iOS 8, instead getting weather information directly from The Weather Channel. iPhones running iOS 8 have a slightly revamped weather app that pulls its information from The Weather Channel, whereas previously, weather information was obtained through Yahoo.
While the source of the data Apple uses is ultimately the same, there are differences in the underlying technology supporting the weather data between the two services. Because of that, the data presented to the end user may be slightly different even though Yahoo also obtained its data from TWC.
In addition to using TWC as a source for weather data, the iPhone's weather app is now displaying a nine day weather forecast, up from the previous five day forecast. There's also a new weather summary at the bottom of the app, noting the current weather conditions along with conditions for the rest of the day.
The new Weather app within iOS 8 is currently available to registered developers. The general public will get access to the operating system this fall, after beta testing has been completed.
Article Link: iOS 8 Ditches Yahoo Weather for Content From The Weather Channel