I am experiencing network-related issues over the past few days as well. Requests are intermittently failing. I don’t have many details at the moment but I will dig into this and provide an update. I’m contacting the WeatherKit service from the western USA.

Seeing this as well. Someone at Apple PLEASE give us a status update. WeatherKit has been plagued with similar issues also with no response or acknowledgement. It's very frustrating.

The issue appears resolved now. Still, no report of any maintenance or downtime on the service status page. Pretty alarming if you are depending on this API for a production system.

I started seeing this around 5:30 PM Pacific Time as well. Submitted feedback, ID FB13081982