I was at the beach a couple of weeks ago flying my drone and it started to rain. The Mavic Air 2 is not waterproof; I would not recommend taking it up in heavy rain. However, in my case, the rain was very light, so I felt ok flying it around a little bit. It was fairly windy, so some of the footage is a little shaky and it was sometimes difficult to fly in a perfectly straight line.
Let me know if you can see a faint rainbow in some of the shots.