This is Mike G in Oldham England
I flew mine the other day in minus 2 degrees but to windy so only up for less than 5 minutes.
What lve started to do is warm the battles up first. I put them in a babies thermal bottle holder with a couple for re-usable gell warmers this gives me more flying time.
I live in Wisconsin. I flew mine the other evening in 15 mph winds and it -4 deg F.
The Q500 handled it well. Actually impressive how steady it was. I flew for about 15 min untill my fingers couldn't take any more!
Today I flew 3 flights on the frozen lake. It was a high of 16 deg F and about 5 mph winds. I got almost 20 minutes each flight.
I live in British Columbia Canada and flew mine at -10 degrees celcius, the camera had problems recording after 1/2 through the 2nd battery. The drone flew fine though. There is a bit more shake to the drone as the propellers become rigid in the cold, the camera gimbal takes care of the shaking though and it was not visible in the videos. At the end there was a film of frost on the propellers, I may need to de-ice them next flight.