In reply to cacheson:
You'll be fine, I used the same kit for Blanca climbing. My experience of the temperature is that sometimes it can be -15 when you get up for your alpine start, so all kit on including belay jacket, but be aware that it is roasting in the sun, so by midday I'd want to have stopped and have found shelter. My first trip I nearly had heat exhaustion as the least clothes I had were a heavy baselayer and long johns and couldn't get cool enough after coming down from Nevada Pisco. The next year I was ready, this is me just under 6500m on the summit of Illimani, having stripped off the warm kit and ready for a sunny descent:
https://www.facebook.com/photo.php?fbid=80973110444&l=5c1b6432fc (yeti gaiters on nepal extremes, are not necessary.)