Back from both Iran and Switzerland, i took a long easterholliday this year. First of all, i did not reach the summit of Damavand, when we went up the forecast said good weather the current day and the day after. When we reached Shelter 3 however the update said a storm coming in in the afternoon the day after, which would last for three days. So instead of spending my Irantrip in a damp and cold concrete bunker, i decided to go down again in the morning, the day after. This gave me the oportunity to explore other mountainranges and peaks in the Alborz-region, so the rest of my stay was spent peakclimbing with skiis, something this area was perfect for, picked a lot of 4000`ms.
I will go back next year, but then in the summer and another route, one are dependent on so many external factors with skiis that you must include a considerable percentage of luck into your consideration.
Advice: Go directly to Rehne from the airport, in the summer the taxidriver will take you all the way up to shelter 2 (Goos fan sara) As stated before, i made use of the services of this firm:
http://www.damavandiran.com/ and as expected they were great, they are flexible and has tons of experience.
If anyone has any questions i will be happy to answer.