I love the 'yawp' weather widget/app. I'm very interested in making my own themes for it.

Are there any websites that give good instruction on how to go about this?

I have installations of Slackware 14.2, Debian 8.10, Mint-KDE 17.04 & Kubuntu 14 (all KDE 4) as for me Linux is the Ultimate Retired IT Person's Playground. Plasma 5 is not floating my boat just yet

A long term project is to make a set of Conky's that look like 'yawp' but only with Accuweather as the provider with lots of different colour schemes in them so anyone can pick & choose what they want. 'yawp' is very good but needs more colour scheme options IMO.

Once I can get my Conky Project done and it all works on Plasma 5 too then I'll pass it out to the repos for all us 'yawp-ites'. (Btw, long term probably means a year or more as I'm on my own here.)

In the very long term, I'm thinking of having a crack at XFCE, but there's no hurry in my life now!