Train in the rain! – If you want to know what it will feel like to run in wet clothes, try a short run on a rainy day to get a good feel for it. March is usually a great month for this. If you can’t find rain, the sprinklers will always work as well.
What people tend to forget is that wet clothes cling to you differently than dry, and they rub different places too. You may have heard people joke about chaffing in uncomfortable places, but it can be a serious problem if you’re not prepared.