
So as not to put a dampener on spirits (sorry!) Mrs. Jones recommends fashionable rain gear such as this hi-gloss anorak from Guess? as well as Irish festival essentials, wellies. Office have a great range which you can check out here.
Granted in all that PVC you will, and be under no illusions about this, look and feel like a day-glo condom but on the plus side you'll remain somewhat dry and be less likely to collapse mid session on account of hypothermia. Your choice really. Rave on children!