Hey,
So about half an hour ago I tried to ran the practice laps in Monza. I was watching the weather, it showed partly cloudy everywhere. I ran my first lap with slicks, but it was on a wet track. "Great timing", I thought. I quit back to the home page and it still showed partly cloudy, so did the weather forecast. Went back to the practice session, showed partly cloudy as well, again. Ran another lap and when the lap was done it switched back to rainy weather once again.
Long story short, it showed partly cloudy everywhere all the time, but as soon as I ran a practice lap, it gave me rain and not just the icon, I was actually running on a wet track. When I quit, the weather reset and it showed partly cloudy again, but it would once again switch to rain in practice.
It's very frustrating that I can't practice on a dry track since I'm expecting that for the race, not rain. And I can only hope the race weather won't be buggy.