If it's sunny the temp should be fine, perhaps put something (box, planter) where they can get out of the breeze if they need to. Also, make sure they're safe from predators, cats, dogs, hawks, snakes, telemarketers, etc.
Here in South Fla I put my chicks outside as soon as I can, so they can leave more of their plentiful poops in the grass. I have pieces of big bird cages that I zip-tie together to make an enclosure, and lay plastic netting over the top. I make sure there's a hiding place for them well in the middle of the enclosure. Sometimes the hawks will land right by the cage & will peck at the chicks through the wire. The chicks' instincts will tell them to run & hide, but if their box is by the side of the enclosure they'll go to hide right where the hawks can still reach them.
When it comes to chicks' comfort, I let them tell me how they're feeling. If they're too cold or otherwise unhappy they'll show & tell you with their loud cheeping & their behaviors. As long as they're going about their little birdy business as usual, you needn't worry about it being too cold for them. But if you find them all huddled up & complaining loudly, then they need some more warmth.
