When are night time drafts bad?

[Big Doggie]

We’ve been having a warm spell here and temps will be in low to mid 50’s all night long. Can I leave a window open at roost height on nights like this? When is it too cold to do same? I have 6 Golden Comets who are over 6 months old.

 

[aart]

Might depend on how strong any wind is.
Mine tend to stay away from the windows even in summer.

 

[rosemarythyme]

Mine tend to stay away from the windows even in summer.

Whereas mine argue over who gets to sleep up against the windows regardless of season. No drafts even when windy.

OP is there actually a draft coming through that window, or just normal air flow? Best time to check is on a windy day.