In reply to blackreaver:
Will there be too much snow for access by foot - almost certainly! It is the height of the ski-touring season, you can however use snowshoes if your skiing is not up to it. It is significantly less efficient, but is viable.
Re the clothes, no idea but I would most likely use similar clothes to ice-climbing in the UK or continental roadside-ish January/February ice rather than Summer Alpine type clothing
People do do routes like the Chere at that time of year, not sure about the Whymper, which would be very serious (the Aiguille Verte is always serious due to the descent). Conditions can vary a lot, you certainly can have avalanche risks. Valley level ice cragging is likely to be finished by then, unless high and pure North facing.
Post edited at 17:24