I am not saying this is applicable to all climates, but from what I have seen in the climate where I am, from several Yuzu plants, maybe about 11.5 degrees F ( -11.35 degrees C) might be the limit of what Yuzu can survive, over consecutive years. At 14 degrees F ( -10 degrees C) it will suffer virtually no damage. Below that it will suffer some partial damage. The plant might be able to survive down to 10 or 11 degrees F with serious damage, but will not be able to sustain that year after year. Not in this climate. Maybe somewhere farther South in the U.S. with a longer and warmer growing season it might be able to recover and not slowly decline from that.
My Dunstan citrumelo appears to have more cold tolerance than my Yuzu and can survive better. The leaves will be more likely to fall off, but they can regrow easier. Yuzu does not regrow leaves as well. It's important that the Yuzu keeps its old leaves because it might only grow 30 or 40 percent the number of new leaves the following year as the number of old leaves on the tree. The leaves do appear to be able to recover from partial damage, and can regain some of their green coloration, but if damaged beyond a certain level, they will eventually fall off, often this may not become fully evident until later when things begin warming up.
I would like to point out that these numbers are really not exact, and are more based on my subjective impressions and instincts I have gathered from experiences, with several plants over several years. So I hope that just helps give some anecdotal idea, rather than being taken as exact reliable information.