Not satisfied with the icons of iOS 7? Perhaps you still hope Apple makes some alternative icons. Apple shows on the iOS 7 promo pages new icons for weather, passbook and memory adapted, while criticized icons for Game Center and Kiosk remained the same. The alternative icons are visible to everyone when you visit the web via the mobile version of Safari.
The Weather app does not cloud with more sunshine, but shows the current temperature. Possibly the icon itself fits in the same manner to the conditions as the clock icon.