Yes, irises are very hardy and can be transplanted just about any time they'll get water. Be careful storing them, though. I dug up a bunch that were taking over an area... put 'em in an old plastic laundry tote for ventilation and left 'em in the garage... when I went to put them in the ground last spring, they were covered with aphids. You're welcome, aphids... sigh.... when ready to move them, put them somewhere else in the ground and/or give some away. I learned my lesson. I had stored others in another location and they were clean. no blooms this year, but they're getting stronger for next year.
good luck!