Can we able to get information from weather app like temperature and other stuff programmatically. Do we have any framework in IOS or should we use apis from Google or Yahoo.
Nothing is built into the iOS SDK directly, if that's what you are asking.
You'll either need to use API's from Google or Yahoo or Weather Underground (wunderground.com), or you might be able to use third party frameworks that folks have made available publicly or commercially.
If it helps you, here is a sample GitHub project that uses Wunderground API's.