It depends how cold it is. Our brake pads are hard compared to normal cars...so the pads will squeal when it gets cold out (like below 40-45 degrees). They did that to me last year and did it recently when it got cold. It warmed back up a little and havn't heard a squeal since.
Its been in the teens and hasnt gone above freezing here in a while and i dont hear my brakes squeal, maybe i cant hear them over the rattle from the front of my car or maybe its because I only have 7k miles on the car but the cold weather hasnt really effected mine