On Cerro Aconcagua we got lucky with weather. Got pinned in our tents only one day at high camp, around 19,500 ft with 60 mph wind and temp around -25F. The climbing window for weather near the summit is only about one month a year. The rest of the year it is getting blasted by jet stream force wind. Got frost bite on the tips of four fingers. Not too bad, but took years to get feeling back.