Possible to launch Apple's default weather app from my application?

One of my client wants to open Apple's native weather app from our application. After few I don't see a possible way, unless we need to go with any 3rd party apps which provides custom url scheme.

http://developer.apple.com/library/ios/#featuredarticles/iPhoneURLScheme_Reference/Introduction/Introduction.html#//apple_ref/doc/uid/TP40007899

It would be great if someone confirm or give me a lead if it is possible.

Its not possible, the weather app doesn't have a known URL scheme and I dubt that it has an unknown one.