Creating live temperature

I’d like to create a static element on screen that shows the latest local outside temperature? Does anyone know if this can be done using an RSS feed? How to get just temperature? How to update automatically?

I’ve done this numerous times in news crawls with great success.

Thoughts/comments greatly appreciated.

just a note. I know I can do this by running a weather app on another computer, NDI in and cropping. Looking for a more elegant solution.