My gara... shop is unheated, except for the heat that bleeds from the
house, and wintertime woodworking in Seattle, although not quite as
rugged as in the Northeast, can be a bit chilly. Nonetheless, I have
glued up projects in temperatures colder than the minimum stated on
Titebond I many times, and have never had a glueline fail. I have
seen the chalking you would expect from glue that's too cold, but only
on the squeezeout.

However, this year I decided to try Titebond III, in part because it
has a lower working temperature than Titebond I. To my surprise, I
had a couple of joints fail, even though I was gluing at around the
minimum working temperature, 45 deg. F. Has anyone else experienced
this, or did I mess up some other factor, like starving the joint, or
maybe not having the surfaces in tight-enough contact?