Ideally, I like to have them paired up right as the storm is rolling in or a 1/2 day before. But for example, this past Thursday it snow'd big time here and even though MeMe warned me in 8 Ball Chat Wednesday night, I wasn't prepared ... so I moved some males around when I got to work (after the snow had started) and within an hour they were all locked up ... so it works either way.
All ball python breeders should be 1/8th weather person.
-adam