The weather display in the notification center is a great feature in iOS, and I would love to have it on my mac as well. Is there a technique or app that allows this?
Googling for the answer to this question has not turned up much, although there are suggestions that one might be able to kludge something together using Growl.
Best Answer
OS X Yosemite's Notification Center comes with a Weather widget preinstalled.
Additional locations can be added to the widget: