For awareness for those looking for weather integration with SmartThings - I have a an Edge driver that supports WeatherUnderground, OpenWeather, US Gov, WeatherFlow Tempest, and Finnish Meteorological Institute weather data sources. There is a catch - and that is that you need to have an always-on computer on your LAN to run a proxy to allow the Edge driver to issue HTTP requests to internet addresses.
See this topic or my README on GitHub.