The fixes can be applied easily by updating the evasi0n 6.x untether and uikittools packages in Cydia, reports planetbeing:
Fixes for the long reboot issue and Weather app issue are now available on Cydia with an update to the untether and uikittools.
It looks like AppSync, tweak for app piracy causes the Weather App to fail. Planetbeing Reports:
People are reporting uninstalling AppSync AND rebooting are solving their issues.
Try having AppSync uninstalled and deleting com.apple.mobile.installation.plist, com.apple.LaunchServices-045.csstore and rebooting
AppSync didn’t cause weather app problem, but it prevents today’s fix from working. Also likely breaks iCloud apps. Piracy has costs.
If you are having issues even after updating these packages it appears that App Sync may be cause. Users who have uninstalled AppSync and rebooted are reporting success.