The httpebble app is now available from the App Store, and you therefore no longer need messy hacks to use it. Hurrah!
For those on Android, as ever, you still have a couple of choices.
(I am making this post here because it affects a wide variety of watchfaces. I remind you that httpebble is generally not responsible for any particular functionality of any given app, and it should therefore generally not be discussed in this thread. In particular, the weather information in any given watchface is off-topic.)