Get weather API key
In order to receive weather forecasts you'll need to get a OpenWeatherMap API key
Follow this instruction to get an API key
You will only need to do this once.
Go to this page and register a new account or sign in, if you're already have one
You can left "Company" input blank, and in "Purpose" input select "Weather widget or app"
An e-mail with a link will be sent to your entered e-mail address.
Open it and click on the confirmation link
Go to your API keys page and copy your key
Right-click weather widget and select "Edit "Weather""
Click the input under "OpenWeatherMap API key" and paste the key. Click Save
If you going to use this API key for another skins, keep in mind that it would only work if the skins uses OpenWeatherMap as forecast provider!