Yahoo weather has stopped working as of 1/3/19 and Yahoo has stopped free API access and now Client ID and Client Secret is required to access Yahoo’s API. My weather has stopped working. I think the binding will need some updates.
see also here:
for clarity for people who don’t read the links:
the binding won’t be updated, it will be removed.
If yahoo weather does not work anymore, the binding does not make sense.
if the binding would use another service the name is wrong
and at this moment openhab has already other bindings for weather services