Where I live, summers are warm and humid, winters are cold and dry. My shop is a 2 1/2 car garage that has never see a car. It's heated in the winter but mostly ambient conditions otherwise. This year I added a window air conditioner but I only run it when it's extremely humid and I plan to work for a good while.
I'm fortunate in that tools in my shop can sit for years and not develop any surface rust provided they are left clean and dry. A basic wipe down before putting things away is about all I need.
-- Dan Rode
"We are what we repeatedly do. Excellence, then, is not an act, but a habit." - Aristotle