White mountains in the winter months should only be climbed with alpine gear - you must be prepared for potentially harsh, subzero conditions and strong winds/heavy precipitation.

Even on clear days, with stellar weather forecasts, you cannot go up there without the right gear.

2 years ago went up to Monroe with my BIL, and we saw a group of 4 guys from Quebec headed up to mt. Washington, fully outfitted, alpine boots, goggles, heavy gloves, the works. They turned back because of high winds. They knew. I got frostbite.