I really don't think weather is the major factor in the responsiveness of turkeys to our calling and the breeding activity level in general. I've killed birds on nice days, and rainy days. I've worked them in the snow, only to get beat by real hens. Gobblers might go through a gobbling lull, but they still know where the hens are and are just as likely to go to them.
We've had a hard winter this year here in the north. While that might slightly delay the flock breakup breeding activity, everything is more dependent on the lengthening daylight than on weather, so by the time the season comes along the turkeys are on schedule. A few days of no gobbling doesn't mean much, and even when they aren't gobbling you might still be able to call them in.
When [url="http://www.EverydayHunter.com"]"The Everyday Hunter"[/url] isn't hunting, he's thinking about hunting, talking about hunting, dreaming about hunting, writing about hunting, or wishing he were hunting.