I should speak with a woman who's done it before. She did mention changing out of her swim suit into another outfit for the ride/run. It's not a super-serious event at all, and I'll be making a debut with the sprint.

Alpine, here's the link to the event. We're in Canada but by March snow won't be an issue. It's probably going to be around 10C, give or take a couple of degrees. Last year it was POURING, though, so rain is definitely a factor.