Pretty much any major change in weather will shut them down for a few days. Stress from getting scared or some change in their lives will also shut them down.
Ideally you can get 1/day/hen but in reality I would figure 80%.
Molt happens in November/December just about the time you want eggs for the holidays. Molt is based on length of light and can be pushed until spring by leaving the light on and not letting them go outside of the house at night.
Sounds like controlling bloom time in some plants.
Clay, you are right about weather changes. One summer here in MO we had a stretch where it was cooking hot and humid. Hens went on strike until cooler conditions.
Damn labor striking birds then like to all lay under our porch where the concrete is shaded and cool. Crap everywhere.
I just called my neighbor that I buy eggs (”farm”)from, and he filled me in on laying hens. He told me what you just said.