For the watch app portion no, the watch app sucks. The push notifications and functions are great but you don't need to load it onto the watch to get that
If I were buying today I'd buy weather nerd
Darks sky powered with a way better watch app. Downside is it's like $3 a year.
As far as dark sky goes, the glances are ugly and varebones. It can't eeplace even the built in weather fkr forecast etc.
I'm currenty using Radarcast elite for a weather app on the watch and have dark sky sending me notifications about rain efc.
Radarcast Elite also does the prediction but it's nowhere near as accurate. Imo however the app allows a radar view on phone and does all the forecast stuff.
Here's the Radarcast glance - I've requested they add high and low to the upper right
Here's the info when you open the app on watch.
Tap the red warning
Main screen - scrollable

There's a bit more info between these
Yah it's that temp at 10:30 am