Hi I left Roncesvalles on May 8th 2006 and took 35 days to get to Santiago. I had just a couple of days of rain towards the end, the rest of the time it was dry. Most of the time the temp was totally pleasant, on a few occasions even in June in the Meseta area it was quite cold, frost on ground and a cold wind with day time temp not exceeding 10 degrees C. I had shorts, 3/4 lightweight pants, a windstopper fleece and raincape, as well as a merino t shirt. This was just enough. I did need a fleecy type bike hat, but did not have one, so used black undies to secure socks which covered my ears, all held in place by a sunhat. Hilarious, but it worked. I did not need gloves or longjohns. Hope this helps with your planning. Gitti