In january we will be travelling both North and South islands with two children aged 22 months and 12 months. On the the South Island the route is Picton-Abel Tasman-Westcoast- Queenstown-(Invacargill)-Dunedin-Lake Tekapo-Christchurch. What kind of clothes will be nescessary for the kids? On the North Island I dont think anything but summerclothes is needed but on the South Island I am not sure summerclothes will be enough. It looks like it can be quite cold in the South also in january.