Thanks for taking your time to report this issue.
I get the same error message regarding unmet dependencies when attempting to install this package on Ubuntu Wily.
It looks like https://launchpad.net/ubuntu/+source/kde-workspace had libweather-ion6, but it seems to have been removed (replaced?) and instead https://launchpad.net/ubuntu/+source/plasma-workspace with libweather-ion7 has been added in Ubuntu 15.04 and newer.
Thanks for taking your time to report this issue.
I get the same error message regarding unmet dependencies when attempting to install this package on Ubuntu Wily.
It looks like https:/ /launchpad. net/ubuntu/ +source/ kde-workspace had libweather-ion6, but it seems to have been removed (replaced?) and instead https:/ /launchpad. net/ubuntu/ +source/ plasma- workspace with libweather-ion7 has been added in Ubuntu 15.04 and newer.