I have heard about some having this issue and have done some research myself but have not found anything that states a clear fix.
My problem is live weather all of a sudden is not working. I choose live weather for my local airport (cloudy/rain). The mini weather preview window shows clouds and rain. Once I load into game it is clear skies and sunny.
Before I could turn live weather on, it was accurate with the live weather where I ever I was flying and would also change as I flew depending on the weather where I was flying.
One thing I am going to try when I fly today is choosing the preset clear skies-load into the airport- once in game, open weather menu and choose live.
Some report doing that fixes the issue and makes the live weather work. I’ll report back when I test.
In the meantime, I was curious what others have done to get their live weather to work again.
Note- this was random and not after any patch or update. Also using steam version.