I don't have access to a chrono.
It's definitely colder than any classes I've taken, but it would be surprising to me to find out that the temp was responsible for so many malfunctions that got consistently worse. I've used PMC in temps much colder than this, and never had any issues. I should also add that the same ammo was used in two G17's today and they worked fine. Not saying it's not possible, just that ammo isn't my number one suspect at the moment.