Comment 1 for bug 176494

Try this: https://bugs.launchpad.net/ubuntu/+source/kdetoys/+bug/44625

"This can be fixed manually by editing ~/.kde/share/config/weather_panelappletrc and changing (while the applet isn't running):
  report_location=0000
  to:
  report_location=XXXX
  XXXX is the city code. You can find out your city code by going here: http://www.ncdc.noaa.gov/oa/climate/rcsg/cdrom/ismcs/alphaname.html
  And here the same 'fix' is mentioned (from which I got the previous link): http://www.linuxquestions.org/questions/showthread.php?t=446240"