No weather information in Yosemite Notification Center First off I know there's a Weather widget in Today view which is working fine for me. What I am referring to is the weather information that shows up right on top under the big date section for some users as below:



Whereas my Today View looks like this:



What gives?

Edit: For what it's worth, here's what my Location Services pane looks like:
I had the same problem and this fixed it:


Open Notification Center
Click the grey Edit button at the very bottom
Click the red minus icon (-) next to Today to remove it
Click the green plus icon (+) next to Today Summary to add it back


Once I added it back, the weather summary popped up.