Yes, I get it work, but eventually the widget disappears.
1- Click the time, right side of menu bar.
2- Click the "Edit Widgets" button at the bottom of the slide-in panel.
3- On next screen, in "Search" at upper left, type the name of a widget.
4- When widget is revealed, if optional attributes are available below it, make a selection: S (small), M (medium), or L (large).
5- Hover over widget. You should see a green "+" in widget's upper left corner.
6- Click the widget. It will move to the right side of the screen.
7- Be sure to click the "Done" button beneath the widget.
Those are the steps I follow, and it works— until, of course, it doesn't. At some point later in the day, or next, the widget disappears. I then have to repeat the 7 steps outlined above. Don't know why this happens. Really, all I'm looking for is a quick, reliable way to glance at the weather, either via a widget or in the menu bar.