I had planned to go in the summer (I went during the end of April, beginning of May), but work intervened - have to pay for these trips some way! I didn't have to use my winter coat until I was stopped by a snowstorm from heading up north (it was a white-out situation - most of the time I could only see a few feet in front of my car, sometimes nothing at all!) The proprietor of the cottages where I had planned to stay ( was kind enough to keep me alerted to the weather and unfortunately, I never made it to the north this trip! I was surprised by how windy Iceland was in some areas. The weather was great in the south, I even sat out on a black sand beach for a while enjoying the crashing of the waves against the rocks.