Like a whole lot of other Apple users, I was drawn to Dark Sky when Apple bought it a couple of years ago. As that app is reminding you, come January 1st, Dark Sky will go dark.
When I first heard about this many months ago, I started searching for a replacement. This was a very frustrating, fruitless process. First there are thousands of apps. Second most are full of ads to the point, there is minimal screen space for weather. And probably most importantly, I am a very impatient person.
But I did get pointed at an app named “Weather” – they are multiple apps named “Weather” - so some work is needed. You want to app from Apple. If you look carefully at the app icon, pick the one with a cloud and sun and no lines to indicate rain or rays of sunlight. If you are unsure, read the information about apps and find the one that shows Apple as the Developer.
The only feature I long for is current location radar which I find useful for time until rain stops, starts or changes intensity. The Apple watch version of Weather in my view is superior to Deep Sky.
Here is a screen shot from the App Store listing which shows the App icon in the upper left corner.