Well the tech sheet says 65F, you can use it to around 55, I usually over reduce and that helps. The primer is a little less critical, the color is a little more critical and when you shoot clear you better have everything just right.

it's been near 32F the last couple evenings when I would be priming, just too cold, I have to use space heaters in my garage and they just don't get it warm enough when it's this cold.