Seeing as you have an API for WunderGround already, here’s my config.js entry for that. Just insert your API key and choose another weather station, the pws (at the website), as mine probably won’t be good for you. I left mine in so you can see how it looks. Also, look at the ReadMe for WunderGround to see how you can change the values below to your liking. Post your config.js file if this doesn’t work for you and we can take a look at it for you. Good luck.
apikey: 'YOUR API KEY GOES HERE', /* private; don't share!*/