I'm looking to make a trip to New Zealand in early summer 2012 (Sep/Oct). How much more difficult is Mount Cook in late October compared to prime season? Besides mountaineering, is October a good time of year to enjoy New Zealand's outdoors (warming temps, sunny weather) at mid altitudes?

I'm planning to go there in January 2012 and I would accept the companion of experienced climber.

Keep an eye on this site for weather forecasts. Should help with your planning.

http://www.mountain-forecast.com/peaks/Aoraki-Mount-Cook/forecasts/3754

(You can choose other mountains in the drop down menu at right).