No problem at all.
My G2 had visited the winter in the northern Japan (-10 degree C), the chilling Canadian alps and Norway. By the way, please beware of the preformance of the battery. You better to have a spare battery in your pocket near to the body since the voltage of the battery will be dropped in low temperature.
>[..Hi Kian-Guan The AF function of my G2 did not work while the mountaineering ski tour in Japan. The temperature was about -15 centigrade and G2 was in my back-pack. It should not expose in the cold air for long time. (I had same trouble of AF with Richo GR-1s.)..] Sumio Koseki
Hi Mark >More likely the cold affected the G2's battery, not the autofocus. Yes, it is correct. Actually I had spare battery, but I couldn't change it at that condition If I wore enough big jacket to carry my G2 inside, it would be better for batteries. It's depending on the situation.
I used the G2 during a trip to Hokaido, Japan in winter 2 years ago. It worked just fine. There was a night I were shooting some ice shots and I felt if my fingers were going to fall down. The G2 seemed to tolerate the cold weather better than I^^.
After caming to New England I have used it in cold weather as well, and there was no problems at all.
I have to agree taht the batteries are the deciding factorto this issue. Go to a c&ing supply store (sporting goods) and get yourself an insulated bag. They come in all sizes. This is a popular item among ice fishermen. The bag will keep the batteries and camera warm. These thing not expensive at all. $20 US dollars? If a camera store where selling them, it might be a different story.