So I changed the locations and parameters to tabs

@andreaska Thanks. I'll change it to a tab instead

So I have updated the design a bit.
I moved the temperature units and wind velocity units to the global drawer following @bshah 's advice.
In the settings page, I have added a list of locations where new items can be added. Following @dkardarakos 's advice, the "Add" button is at the bottom.
The redundant information in the details page have been swapped with a graph for parameters throughout the day.
There's now a way to change the location.

@mart this is just a drawing.

You're right about the duplicated information. Maybe we can swap it with time based graphs. For example if the user selects Thursday's forecast they will be able to see a graph of how the temperature changes throughout the day.
Thank you for your feedback.

I have made a mockup https://phabricator.kde.org/M129
Any feedback is appreciated.

@dkardarakos You bet I am. I have been reading the HIG this whole time. I'll check out the other two resources.

Yep. I was going to use that. I had previously made a kinda weather app for Android, and used OpenWeather. It's neat.

Thanks. I'll take a look at it and start working soon.

Thanks. I will then work on the application. This will be my first time contributing to KDE. Are there some rules/steps I should know about?

What do I need to do if I want to contribute?