Transitioning Outdoors

I’m a new chicken parent. We got our birds March 8th - I assumed they were probably just days old, but looking at them now, I’m thinking they are closer to 5 weeks old. 4 Easter Eggers, 1 Brahma, and 1 Speckled Sussex. I’m in the Pacific Northwest and have been really conscientious (worried) about when it’s time to transition them out to the run. I’ve been taking them out there daily for 4 days now and they seem to love it.

It’s drizzly and maybe 50 F out and they are currently out there. They’ll huddle a bit but then go about their chicken business. Do you think they’re close to being ready to live out there full time? Pics for reference.