First Time Outdoor AutoFlowering

Plants look good but your issue is iron deficiency which is being caused by the low temperatures. The cold night time temps are shocking your plants. Root growth is slowing down don't water as much or you will wind up with the roots starting to rot. If possible bring pots inside at night to prevent exposing them to low temperatures. Using a foliage spray with Cal/Mag and iron to correct the deficiency may be a better solution than root absorption. Good luck hope you get some warmer weather.