I like showing the current weather conditions on my dashboards, but the heroku app that was feeding my weather widgets stopped working. I submitted a pull request to fix it, but I guess the original author isn't maintaining it anymore. But no worries, as I made my own!
Here's a simple rails application that gets data from the openweathermap api and converts it into a format that you can use with the "Text" custom widget.
To run your own (for free!), click this link to deploy a copy to Heroku.
When that's done, you'll have a link that looks something like "https://generated-subdomain.herokuapp.com/weather". This is what you're going to use for the "URL data feed" for your text widget.
You'll need to register a free account on openweathermap.org to get an API key, and you'll want to set Reload Time in the widget settings to 2.5 hours if you want to stay within the activity limits of the Heroku free tier.
I hope this proves useful to someone!