Hi all, I've been trying to fix this issue for awhile and I found a way to trouble shoot it a little bit. The work around is essentially using the weather widget to restart the at a glance weather. I believe the main issue is most of us turn off our location history (for good reason) and it messes with the weather function of at a glance

weather fix screens

I included screen shots to show you what I did

Image 2: you need to make sure that your personalize using app data function is on. I know a lot of ppl don't like his, but the weather at a glance will not work without this function (for some reason)

Image 3: I added the widget for weather and the mini widget to give you examples. Whenever my weather at a glance freezes, doesn't update the weather, or just disappears....I tap on one of these widgets and it resets the weather data and makes the at a glance weather reappear

Image 4: this is just to show you wear to get the mini icon. You have to go into the Google weather widget, click your profile icon, and you will see the add to home screen

It's not a permanent fix....and if you want a perm fix you may need to allow more data than you are comfortable with. But this is temporary enough to keep the aesthetics of the weather for the lock screen and homepage.....I hope this helps. If it doesn't, I'm sorry