If you mean minute-accurate forecast for the next 4-6 years... That's called Nowcasting, and yes, it exists. Bing Weather have it, ACCU Weather as well. Rain viewer too. I believe Google already implemented on Pixel Weather at least.

IMO the best of these are Bing Weather and Rain Viewer, both provide rich maps showing where the rain it's going and all too. And how much.

Apple purports to still have this, but it is indeed less reliable than Dark Sky.

However, the author of Carrot for iOS implemented his own flavor of this* and it's remarkably decent.

* According to Gruber interview around the same time Carrot introduced an entire Broadway musical about the conflict between the Carrot AI and her Maker (the dev). Which, while made with AI, is rather more listenable than the typical weather app.

My friend's kids would ride their bikes to school in the morning, and on rainy days, check Dark Sky to find the driest time window. It was usually quite accurate.

Apple definitely broke something when they incorporated Dark Sky into their weather ecosystem and it isn’t nearly as good in my locality.