I, too, prefer the cold weather over the unbearable heat. I live in Oregon in the mountains where we get plenty of snow and cold. We can't plant anything until the middle of May or when the snow melts off Mt. Emily. We've had snow in June here.
I had my new Bernina shipped in July from overseas to me and it runs fine. I wouldn't worry too much about the heat. But I would add them to my homeowner's insurance