With the latest HA there is a new Service-Call introduced for the Weather-Forecast Integration
And im not sure if there is an “Official” solution “printed” down somewhere, but there is a few suggestions here in the forum, in regards to using these data (forecasts) in i.e templates … depending upon in what way one will need these data, … you are in for a journey in automations/templates/template-sensors/binary sensors etc 
EDIT: 2023.12
Note that the Service have changed to " Service weather.get_forecasts " an extra (s), Docs are updated !