Choose Insert, then More Gadgets.
In the Google Sites Editor, find the Insert menu, and open it. You will be able to see a list of gadgets you can add to your site, like Links, Tables, and Images. Select More Gadgets. This will allow you to add customizable tools like POWr Weather to your site.
Copy and Paste
The Gadget manager will appear. Click Add Gadget by URL. Then paste this URL into the field. Click Add to finish.
Adjust Height and Width
Now that you’ve added your new, customizable Weather Widget to your Google Sites page, you’ll probably want to adjust the size and shape of the Widget. Use the different options in the window to select the height and width of your plugin. We don't recommend it, but you can insert a scrollbar, title or border to your Weather Widget. You’ll have more editing controls directly through the plugin.
Set up POWr Weather
Go to your live Google Sites web page and select the gear icon in the top right corner of your Weather Widget.
In the POWr Editor, click Import Existing Weather, find Weather- and click Copy.