Skiing in T-shirts!
The ski season in Pas de la Casa lasts from December to mid-April.
I was in Andorra at the beginning of May. So, I didn't ski but my Polish friends were in Pas de la Casa in March 2006 and they were very satisfied about skiing and weather (a lot of sun and only one foggy day during 10 days) in Pas de La Casa - Grau Roig ski station (over 30 ski lifts and over 50 ski trails for everyone) in eastern Andorra. They were skiing in T-shirts as the temperature was often about 20C. Their stay in Pas de la Casa cost less than in the Alps. They were surprised to meet apart from skiers from Spain, France and Germany, quite many Russians and no Poles. They warned me that ski trails marked red are very difficult (as black ones in Poland) and those marked in black are for very, very experienced skiers, diffucult to survive (read: not for me :-). Shortly they told that they had the best skiing vacation ever. Well, they were skiing in Italian Dolomites as well as a few times in Austrian and French Alps before. The only disadvantage was the distance from Poland to Andorra which shortened their vacations by a few days (they drove by own car) and added some costs. But they visited fairy-like Carcassone in France on the way to Andorra and had a lot of sun on a beach in French Riviera on the way back.
Five days Andorra ski pass (valid for all stations) for season 2006/2007 costs 157,5-168 euros. Follow the link below for up-to-date info. My friends had own skiing equipment as it's always less expensive for them skiing every winter many times. But they told me that they may buy some new equipment in Andorra next year as it was cheap at the end of season (30-50% off at the end of March).