I've been having these same errors too. Initially, I reduced my app to only use 9 days of future data since the 10 day forecast would randomly throw 400s, but randomly today, it didn't even give me that much! Now I've had to reduce it to use 8 days worth. This really needs to be fixed. Also, 100% agree that specifying the number of days in the future instead of me calculating the hourlyEnd would be much more intuitive.

Thanks for the response. The weatherkit WWDC video (https://developer.apple.com/videos/play/wwdc2024/10067/) does announce the v2 weatherkit REST API. There are multiple segments providing the sample code & API responses, and they encourage us to try it out. The API itself is already public, as I am able to make requests to it similar to the sample shown in the video. However, I don't know the syntax for things like historical data, as this wasn't explicitly discussed in the video. I'm pretty confident it exists in the API though. Would you please be able to check with the weatherkit team to see when they plan to update the documentation (or if it's possible to know the syntax for historical data ranges)? It's critical that I have access to the new features ASAP. I would really appreciate it. Thank you!

Any updates, @DTS Engineer? Would be much appreciated!

Any updates?

Any updates? @DTS Engineer