[Russell Sobie]

until it affects only the sky (like clouds, fog etc.) it's ok, but if it will affects the track (with the rain fx coming soon) no. there are already people who can't keep the car in the track for a single lap with good weather, i can't imagine what could happen with rain lol

A thousand times this. And not only this, but with the limited time I typically have to practice before racing, having to account for more variables than just other drivers would significantly lower my personal performance and enjoyment.