Well, I am curious as to your answer - I am in Eastern Ontario, USDA 4b equivalent I believe. I had to bring my Hardy Chicagos in from the garage, as temperatures were just too low this winter. Kept them indoors, and when they started to bud I felt I had to move them. I have given them a southern facing bay window, and they started to take off quite nicely.

Results so far - about a foot of new growth on each of the branches, except the two that had a breba fig each. The last breba fell off this week, I am guessing not enough sunlight/warmth. However, they are starting to set fruit and I can probably move them out in about two weeks.

yes it will work but you need to accomodate plant to outside slowelly,in shade first,otherwise it will defoliate and die.

You can bring them indoors to wake early but with it comes flying insects that also wake up in the soil from eggs laid previously that outdoors mother nature would otherwise balance
during the season.
As Herman mentioned you would have to assimilate them to the sun .
Martin

In the interests of refining the process, I thought I'd post these progress pictures - this is Day 5 of gradual exposure. The leaves have darkened up over the week, where I have been adding an hour of prime sun every day, using the distance from a northside wall to control exposure. They have had to come in two nights because of low temperatures.

As you can see, relatively little other green outside, the grass really just started out of dormancy perhaps 10 days ago. Without tasting a fig yet, I would say this is a qualified success, there are a few visible figs now and quite a few buds forming, overall they seem healthy. Last frost date is still almost two weeks, once that comes they will around to a full sun location.

I put them into sunlight and indoor heating in early March, primarily because they appeared to be breaking dormancy anyway. Next year, I may try a few weeks later, the fact that the breba dropped off suggests that conditions for fruit formation have been less ideal. These were fairly small last year when I got them (August), so I didn't have great expectations for this year anyway.

Here in Florida the fig trees are very hardy and cold hardy when planted outdoors. Mine are just starting to set fruit. Have two trees next to each other and another on the other side of the house. They are both 25 years old and supply me twice a year.