The local gov’t here in Jefferson County, CO, USA installed some weather stations from a company called “WeatherStem”. One of them is pretty close to my house and it has a great set of sensors installed:
There is a big blue button that says data mining and it says things like, “UPDATE The WeatherSTEM Data Mining Tool is open without restriction again!”. That sounds like a good opportunity to get some HA interaction. It looks like there are links to download data as json or csv.
This page shows a nice API.
And an alphs api v2 (who wants v1, when there is a v2?): https://www.weatherstem.com/apiv2_docs