I would think that they need snow for this- they have to have enough snow to be able to use the snowmaking equipment to blow the jumps. I wouldn't expect it to be open by Christmas.
We have had a high pressure system hanging over us for the better part of a month. This is a La Nina year, and there is a good chance that by the end of the season it will be average. In order for it to snow a lot in Colorado the Pacific Ocean needs to cool a little more so that so big storm cycles can churn out. It may take another month, but there is a good chance that when it goes off it will DUMP. There is a chance for snow this Sunday/Monday, so hopefully that system will just be strong enough to disturb the ridge of high pressure and shift the jetstream to Colorado. If not this one, than the next system.
Trust me, this year has been tough for us out here too, and hopefully it will start to snow in the next couple weeks and then continue to dump when you are out here.