We're in NC. It's not that cool yet. Lows in mid-40s, highs around 70 right now. The garage is insulated but we open it a few times per day for a short period of time. They're fully feathered, and they have zero draft in their brooder (only the roof has 1' square section of wire mesh). Think they'll be OK?
I believe so, though this is my own opinion. Quail are kinda tolerant with cold weather apparently; so not freezing cold, but cool. As long as they have access to a warm light/heat source, food and possibly even warmish water (doubt it's really needed, regular tap water is fine, but warm water is suggested), they should be alright. Heh, my coturnix quail live outside (6 months old), every time it's a nice sunny, warm day they like to stay in the shadows, but when it rains and is partially chilly, they just casually frolic around in their enclosure.
Bobs take longer to mature than Cots. 4 week old Bobs may still need a heat source if it is getting into the 40's at night. You can omit the heat during the day, but offer a heat lamp at night. Hang a lamp over their heads in the middle of their area, not warm enough to heat the entire space, and enough cool areas around the edges so they can acclimate to cooler temps. Do this for about a week or so and then you can remove it.
