The application hasn't worked for a year or so, since weather.com stopped providing weather data. Please update to newest git snapshot, which works nicely.
0.8.0 has finally been released. Look for updates soon...
xfce4-weather-plugin-0.8.0-1.fc17 has been submitted as an update for Fedora 17. https://admin.fedoraproject.org/updates/xfce4-weather-plugin-0.8.0-1.fc17
xfce4-weather-plugin-0.8.0-1.fc16 has been submitted as an update for Fedora 16. https://admin.fedoraproject.org/updates/xfce4-weather-plugin-0.8.0-1.fc16
Package xfce4-weather-plugin-0.8.0-1.fc17: * should fix your issue, * was pushed to the Fedora 17 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing xfce4-weather-plugin-0.8.0-1.fc17' as soon as you are able to. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-2012-11051/xfce4-weather-plugin-0.8.0-1.fc17 then log in and leave karma (feedback).
xfce4-weather-plugin-0.8.0-1.fc17 has been pushed to the Fedora 17 stable repository. If problems still persist, please make note of it in this bug report.
xfce4-weather-plugin-0.8.0-1.fc16 has been pushed to the Fedora 16 stable repository. If problems still persist, please make note of it in this bug report.