Apple Support has posted a helpful guide to Apple Weather especially for people coming from Dark Sky:
> Dark Sky’s features have been integrated into Apple Weather. Apple Weather offers hyperlocal forecasts for your current location, including next-hour precipitation, hourly forecasts for the next 10 days, high-resolution radar, and notifications.
> Apple Weather is available on devices [running iOS 16, iPadOS 16, and macOS 13 Ventura](https://apps.apple.com/us/app/weather/id1069513131). If you’re new to Apple Weather, here are some tips to get started.
The background, in case you are wondering and don’t already know, is that Apple bought Dark Sky a while back, and now they have shut down that service.