Nope. Should be able to use it as a REST API on other platforms too.
> It’s easy to use WeatherKit in your apps for iOS 16, iPadOS 16, macOS 13, tvOS 16, and watchOS 9 with a platform-specific Swift API, and on any other platform with a REST API. [0]
> It’s easy to use WeatherKit in your apps for iOS 16, iPadOS 16, macOS 13, tvOS 16, and watchOS 9 with a platform-specific Swift API, and on any other platform with a REST API. [0]
0: https://developer.apple.com/weatherkit/