I never have simply becasue I don't have anywhere to pack them away to- though I might use a box under the bed if I can get rid of some of DH's stuff in it.
However, I find that I wear 75% of my clothes all year round- it's called layering.
The only things I'd pack away would be very summer Ts,a few cardis that are summer wear, and a couple of skirts/dresses.