No a/c needed. For you cab, I'd use a nema 3 or better. Indoor/outdoor. No blown dust or ice protection. But better for the cab that nema1.
Many house garages are not insulated & a popular location for an electric panel. Mobile home panels are mounted outside, on a pole.
“To suppress free speech is a double wrong. It violates the rights of the hearer as well as those of the speaker. It is just as criminal to rob a man of his right to speak and hear as it would be to rob him of his money.”