> do you think the same thing happens when bees winter in storage sheds under climate control?

Lloyd Harris did amazing work with bees wintered indoors. Part of his findings:

Honey bee colonies confined to winter quarters reared small
quantities of brood continuously throughout the winter although the
amount they reared decreased towards the spring. Because of the
amount of brood reared during the winter, adult populations
increased. As spring approached, however, brood rearing declined
and the net result was that in the spring adult populations were only
slightly smaller in most colonies than they had been when the
colonies went into winter. Had brood rearing not occurred during the
winter, colonies would have been significantly smaller than when they
went into winter. Further study is required to determine why brood rearing 
declined during the winter and how it can be regulated.

Harris, J. Lloyd. "Development of honey bee colonies on the Northern Great Plains of North America during confinement to winter quarters." Journal of apicultural research 48.2 (2009): 85-90.

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