How old for first field trip outside?

[cwyrick1022]

My chicks vary in age from 1-2 weeks, I'm not looking to take them out anytime soon since the weather here has been chilly and windy. I'm just curious as to how old do chicks need to be to be able to go on a field trip outside? Here in Oklahoma our weather can be unpredictable, but I'm hoping in a few weeks it will be warm and sunny enough to maybe take them outside?

 

[chickenweirdo1]

Depending on wheather i go out with my chicks at around 2 weeks old. Probably only for about 10-15 minutes before i put them back in the brooder though.