By luck I had cloudless skies and the French Base Camp (4200m) to myself.
Aconcagua has a notoriously unfriendly micro climate.
On my return to Mendoza I met a guy from South Africa who was forced off the other side of the mountain at 6600m by weather. The climbers had been slogging through a metre of snow and it finally got too dangerous to continue.
To celebrate I had a big chunk of Argentinian barbecue beef. And fresh baguette.