They will be 8 and 9 weeks old. They will still be sleeping inside the house for a couple more weeks though.
Temps are still getting pretty low at night and the breeder recommended to have them sleep inside for another week.
You're in an even warmer area than I am and I had my March hatch babies off heat and sleeping in the Open air coop with the others at 4.5 weeks old. At 6 weeks in this recent cold snap and late frost they're thriving.
Once they're fully-feathered they can cope with the outdoors.
In fact, in our climate, heat is MUCH more dangerous to them than cold -- and they need to acclimate.
https://www.backyardchickens.com/articles/hot-climate-chicken-housing-and-care.77263/
