How late can queens mate? I found a document that states queens were seen mating the latest at 22 days after emerging!

I have couple queens that I checked 15 days after emerging. All were running like virgins.Weather was pouring buckets until day 15 when I opened them. One queen even flew off the frame. The next 2 days, day 16 and 17 after emergence were very hot days. Is it possible the queens mated those days?

Can't check them again for brood due to pouring Barrels of rain!