But that's the point. The map is based on the Dark Sky algorithm and only goes out an hour or so. And that's where the next-hour precipitation graph comes from -- and I've never seen them not match. Everything else is standard weather forecasts. Dark Sky itself worked the same way. It wasn't making 6-hour forecasts using its 1-hour algorithm. The results would have been terrible.
This is why I don't understand the complaints that iOS precipitation accuracy is worse than Dark Sky's. The map works the same way. The chart works the same way. Complaints about UX I get. But not the complaints about a supposed fall in precipitation accuracy.
I get that it's a common trope that products always supposedly get worse once they're bought. But in this case, in terms of accuracy, I just don't think it's true. And remember, Apple would have zero reason to worsen the quality. The whole point of buying it was to improve iOS weather. Which it did.