I live in West Michigan. Right now it is 20 degrees out there. Painted a fork 6 weeks ago. Temp was 35 degrees. The fork and spray paint in a rattle can (Rustoleum) were at room temp, roughly 65 degrees. Sprayed outside and immediately brought inside to dry. Wait time between coats was 3 hours. Three coats plus 3 clear coats. Not sure at 20 degrees how the paint will atomize, but at 35 degrees it was just fine provided it cured indoors.