It's not really often core apps get updated on BlackBerry 10 but every now and then BlackBerry decides to push some changes into BlackBerry World without waiting for the need of a new OS. Such is the case with BlackBerry Weather along with the Compass app today. Both have been updated with 'improvements, UI changes and bug fixes' and are currently available in BlackBerry World, right now. There's certainly no rush to get them downloaded but if you happen to be perusing BlackBerry World, you might as well. Keep in mind, the updates might be limited via device and OS as it seems only those on 10.3, either officially or unofficially, are seeing them as available.
Update - The BlackBerry Calculator has also been updated for you folk that like to use it