Metal building condensation

Rob,
Was in my metal storage garage today, it is only a 12 x 20 but it had no moisture on the roof or walls, it has no insulation.
Box fan running on low, it does have gabel vents on each end, no heat.
But it does only get a little of the morning sun, so maybe being shaded most of the day helps?
Got to love the monsoon weather the east coast is having now, it sucks.