In reply to lachy773:
1) You have about a month until your course, conditions will change and change again in that time. Its way too early to know whats going to happen.
2) It a course, I would be highly suprised if there isn't enough snow/ice in sheltered corries (even if the temps are high and the mountains are green) to practice the skills you need to learn
3) Contact the course provider and speak to them, they will advise on your options. They may transfer you to another date etc. If you cancel they would probably have no requirement to return any of your money this close to the start date. Do you have adequate insurance to cover such events?