Ok so me and my aunt were talking. I told her about my older girl who is broody alot Hatched eggs in June and they all hatched right on day 21. I told her again in setember hatched another clutch in 21 days right on time. Again in november she set on a clutch that didnt hatch till day 26! So we got on the topic of the weather outside effecting the hatching under a broody. See with a incubator we can controll the temps. So if a broody is outside in colder temps could this effect the Incubation period? Could it be the possible delay in the hatchng of eggs under a broody? I'm sure it does for my last broody to hatch eggs on day 26. Temps outside were very cold and freezing. Share your thoughts please and if you have had a broody outside in colder temps and how it effected your hatches.