This is the appearance of the weather widget. If you want to get this widget for your home page, please contact me and I will send you the code. Finally the webmaster has to implement the code on your webpage.
There is one basic requirement: Your server must have PHP and the widget must be implemented on a PHP-webpage (file extension .php), because the widget is written in PHP. Of course the name of the location (here it is Hannover) is adapted for your place and your widget always displays the latest weather data (this one is only an example).
The width of the widget is dynamic. So you can adapt the size of the widget for your needs. Of course background color and other settings are swappable.