I read the back of the can and it said the minimum is 50F. It's going to be in the mid 40's so it shouldn't make much of a difference. When I'm done with each coat I'll bring it inside the house to let each coat dry. Hopefully the difference in temperature from the house and outside won't cause any problems for the paint.
Also, when I'm finished painting the case entirely how long should I wait to reconstruct it (all the plastic pieces and hardware) so that the paint won't get damaged and chip off? The can says dry to the touch in 20 minutes, dry to handle in an hour, and completely dry within 24 hours.