This extension connects to the Weather Underground API service. Weather Underground provides weather forecasts with special features, e.g. an almanac or Personal Weather Stations. You need to get an API key first. Visit https://www.wunderground.com/weather/api/ to get one. Take a look at the very good explanation on the App Inventor home page. You can find the extension along with an example project on it’s GitHub page.
Version 2 has a ton more features such as
I tried to simplify the API response, for more details see the aia. The extension now returns code 400 for an invalid request and code 404 if the location couldn’t be found.
-XML does not work, throws this error
java.lang.NoSuchMethodError: No virtual method end()Z in class Lorg/json/XMLTokener; or its super classes (declaration of ‘org.json.XMLTokener’ appears in /data/app/edu.mit.appinventor.aicompanion3-2/base.apk)
2017-11-17: Initial release
2018-01-09: v1 released
2018-02-23: v2 released