My husband and I will be in Christchurch from July 16th through the 20th. We really want to see Lake Pukaki and the surrounding areas because it looks absolutely stunning. We are renting a car while in Christchurch, but we aren't sure whether or not the drive from Christchurch to Lake Pukaki will be affected by the winter weather at all. I haven't been able to find much on the net about this drive in the winter time. Would love to know what exactly to expect on the roads during July...snow, ice, or neither so that I can make a decision on whether or not to just book with a tour guide instead. Thanks!