WeatherKit always fails with 404 for specific lat/long/dates with forecastDaily

I’ll also mention that this is particularly frustrating because we also routinely see requests that initially fail with 404, but if we retry a few times (sometimes even a day later) it will eventually succeed. So we have built our app to retry a few times if we get a 404 error. However, in the cases posted above, they never succeed. It is not a good experience that we seem to get the same error from WeatherKit for queries that temporarily fail and those that permanently fail, because we will have to try to distinguish the two cases based on heuristics around how often it failed for particular dates / locations for each user. WeatherKit should really throw different errors, or return an empty array, if data is never going to be returned vs a temporary failure. Of course it should never throw an error for a valid query, but given that this is happening we would like to see better errors.

Thanks for sharing! I have seemingly ran into the same issue, with - of all places - Apple Park, Cupertino... The following code fails with status 404. It seems that trying to get any history before that date fails too, whereas getting the history after that date succeeds.

        settings.startDate = Calendar.current.date(from: .init(
            timeZone: .init(identifier: "America/Los_Angeles"),
            year: 2023,
            month: 9,
            day: 27,
            hour: 0,
            minute: 0,
            second: 0
        ))!
        settings.endDate = Calendar.current.date(from: .init(
            timeZone: .init(identifier: "America/Los_Angeles"),
            year: 2023,
            month: 9,
            day: 28,
            hour: 0,
            minute: 0,
            second: 0
        ))!
        
        settings.locationLatitude = 37.334886
        settings.locationLongitude = -122.008988
        
        let location = CLLocation(latitude: settings.locationLatitude, longitude: settings.locationLongitude)
        
        do {
            let dayWeather = try await WeatherService.shared.weather(
                for: location,
                including: .daily(startDate: settings.startDate,
                                  endDate: settings.endDate))
            
            print("Received \(dayWeather.count) DayWeather object(s).")
        } catch {
            print("WeatherKit Error: \(error.localizedDescription)")
            throw error
        }

@rkhamilton I noticed today that issues in Berlin I had reported and the issues in your code seem to have been fixed (I wrote some Unit Tests which now fail b/c "Expected failure but none recorded" :) The Apple Park issue still there but maybe will also get fixed soon.