As far as accuweather being the most accurate source, I can agree (for Germany/Bavaria) too. What is disappointing, however, is the fact that yaWP stopped working. None of the sources finds any location, it just waits endless with a dialogue "yaWP is retrieving a list of cities from the internet...".
This affects both the versions 0.3.3-1 (which can be installed from debian/testing),
0.3.3.-2 (debian/unstable) as well as 0.3.4, downloaded and compiled from
http://kde-look.org/content/show.php...&content=94106. I already spent hours reinstalling different versions, at no avail.
On the other hand, for Northern Bavaria there is a simple source with excellent forecast data (
http://www.wetterochs.de/wetter/wettermail_inhalt.html), and many similar regional sources should exist elsewhere.
It would not be too difficult to read and extract the relevant information using a Python script. So if anybody knew a tutorial for fellows with moderate programming skills (i.e. Python, not c++; or even better a comprehensive and customizable sample source weather plasmoid (or additional dataengines for existing plasmoids), more KDE users could start to contribute themselves.
The existing "hello python plasmoid" howtos I found yet (e.g. linked on
http://forum.kde.org/viewtopic.php?f=64&t=21263) are too simple for that by far.