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I've see this before and in my case it was because Date() returns the date at UTC and NOT the local date. So, depending on the time of day that the Date() function is called and where the device is located, you might get a date result that is NOT the local date of the device! It took me a while to figure this one out. To avoid problems with this, you would need to pass the local date to WeatherKit if you want to startDate to be the current date at the device's location. Luckily, there is a nice extension on StackOverflow that gives you a Date().localDate() function that fixes this issue. https://stackoverflow.com/questions/28404154/swift-get-local-date-and-time
Is this currently working? When I try this code with a date range shorter than 10 days I get back the historical high and low temperatures for the first and last date only; not for all the dates in the date range. Sample code is the same as the one given by @JohnOfSF above. Here's a sample output:
Aborting silent interpolation: additional missing products that need to be fetched from the server anyway; location=CLLocationCoordinate2D(latitude: 37.77, longitude: -122.41), missing products=[WeatherDaemon.WeatherProduct.forecastDaily]
days count=4, date range=2023-10-18 07:00:00 +0000 to 2023-10-21 07:00:00 +0000, first condition=Mostly Clear, first high=28.52 °C, first low=14.12 °C, last condition=Partly Cloudy, last high=19.17 °C, last low=13.05 °C
Note the missing data for the days in between 10/18/2023 and 10/21/2023. Is this how this is supposed to work? If so, what is the point of providing a data range? Is there a different call/function I should be using to get all the data for the entire date range?
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I have a similar issue but I have gotten a step further. I am using a call similar to the one posted by @Jklr above. I am using this:
let weather = try await weatherService.weather(for: location, including: .daily(startDate: startDate, endDate: endDate))
When I try a date range greater than 10 days, I get an error. This, I suppose, makes sense since the docs say we are limited to pulling 10 days at a time. So I tried the call with a startDate of 5 days ago and an endDate of 1 day ago. This got me a bit further. I actually got some data! The returned the data is below:
days count=4, date range=2023-10-18 07:00:00 +0000 to 2023-10-21 07:00:00 +0000, first condition=Mostly Clear, first high=28.52 °C, first low=14.12 °C, last condition=Partly Cloudy, last high=19.17 °C, last low=13.05 °C
Question is - why does it not return data for each day in the requested date range? It only returns data for the startDate and the endDate - not the days in between. Is this how this is supposed to work? Shouldn't it return a list of dates with high and low temps for each day; not just the first and last conditions?
Also - why is there a 10 day limit for historical data? I can understand a 10 day limit for future forecasts but why limit historical???
