The following information is derived from the plugin description.

Adds a widget with a weather display to the dashboard.

The widget configuration requires an API key that has to be obtained from openweathermap.org. It also should be configured with the location e.g. "London" or "London,UK" to receive the conditions for a given place.

You can download and install the plugin as is, but it is recommended to to download, unpack and check the content first. The plugin sample includes the source code as well as README files with further information and instructions. The sample plugin is also included in the SDKs.