This is related to a buggy weather data update procedure in version 0.8.1 (q.v. https://bugzilla.xfce.org/show_bug.cgi?id=9382 ). An update to 0.8.2 would fix this.
** Bug watch added: Xfce Bugzilla #9382 http://bugzilla.xfce.org/show_bug.cgi?id=9382 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1066400 Title: Weather applet fluctuates every now and then To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xfce4-weather-plugin/+bug/1066400/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs