I'm not sure if this will be of any help considering I'm in Georgia but I think the weather has more to do with squirrel movement than anything. From my experience, even in the worst weather for squirrel hunting daybreak and dusk will both show squirrels on the ground but I have also had days when they seemed to be out and about all day.
The movement at dusk is usually squirrels returning to nest and at daybreak they are leaving the nest to forage.
No matter what time of day it is, there's going to be a few coming or going to do this.
Hope this helps!