This app was mentioned in 3 comments, with an average of 2.00 upvotes
No problem.
And then you need a launcher to support the icon pack. I prefer Nova, but GO Launcher automatically stylizes everything for you.
It'll cost you a few dollars, but with some searching you can find the .apk-s for free.
Enjoy!
Go weather did this a super long time ago. https://play.google.com/store/apps/details?id=com.gau.go.launcherex.gowidget.weatherwidget