The coldest day I have worked outside here, handling aluminum and building a sunroom is minus 37C. That's actual temperature, before people add a bunch too it for wind chill. And it was windy that day.
That works out to -34.6F
Yeah that was a bit on the nippy side. I even had to put gloves on that day so my hands didn't stick to my aluminum extension ladder.
My cordless tools growled more than they ran....
Wasn't too fond of the icicles hanging off my nose.
Caulking didn't stick very well. In fact, it didn't want to leave the tube.
I prefer summer.