The following post provides an option if you want to use a Hubitat attribute that has HTML content in it. As the post alludes to, it’s a bit of a hack that some device developers use to inject HTML into their attributes and is not something that you’ll see in official drivers. ’
Alternatively, I would suggest taking a look at the following help article around weather options… the Open Weather Custom Tile is a popular option as it provides a rich set of data. Alternatively, there are a few other options listed in that article.