Which Provider do you use? Yahoo weather?
You need to configure the binding in openhab.cfg, example:
weather:location.home.latitude=47.8011
weather:location.home.longitude=13.0448
weather:location.home.provider=Yahoo
weather:location.home.language=de
weather:location.home.updateInterval=10
Next step is to configure the items, example:
Number Temperature "Temperature [%.2f °C]" {weather="locationId=home, type=temperature, property=current"}
Number Humidity "Humidity [%d %%]" {weather="locationId=home, type=athmosphere, property=humidity"}
At this moment Yahoo weather service is up and running, so it should work out of the box.
Good luck, Siegfried