I was in Cogne for New Year's Eve and did some ice climbing with my wife. We were there from 30. December 2014 until 4. January 2015. The overall situation was typical early season ice: some things are not formed yet, ice is thin, and the climbs are harder than the grades.
What follows is a short overview:
Cascade di Lillaz - forming well, but too much water flow. The steep, short practice lines before the main fall are formed with possible top ropes from above. Also the easy gulley to the left of the main fall is well formed and not running with water.
Tutto Relativo - good, pillar not formed on crux pitch but possible with a few easy mixed moves on left, upper ice good
Pattigagio Artistico - very good
Hard Ice in the Rock - very good
Pattagagio & Hard Ice are reached with the standard traverse, the lower columns are of course not formed. There was a team that did the mixed variation on Pattagagio
Stella Artice is not fully formed
Cold Coulior - a bit harder than the grade and run out on the third pitch due to thin ice and a delicate exit. It is fun to climb with more features than when fully formed, upper ice is good
Tuborg is possible but the curtain is not fully formed all the way across and a small pillar touches down on the left
Candelera del Cayote has been climbed a lot but is perhaps a half-grade harder
Lauson - very featured and wet. Climbable when cold and best on an overcast day
Thoule - protected from direct sun, but still pretty wet later in the day. Overall very good shape
Patri - in the best shape of all the ice in Valnontey, and therefore the unthinking masses are lined up 10 deep .....
Repentance - has been climbed and is in good, but early season, conditions
Monday Money - first pitch is mixed and the rest is good ice, but also like Repentance in early season conditions
There is very little snow in the valleys. Approach skis or snow shoes are not needed. Temperatures have been pretty good (http://www.yr.no/place/Italy/Aosta_Valley/Cogne/long.html) with well below freezing at night and generally clear skies. There has been very little to no precipitation & temps are at about -10 to +4 degrees.