Not really. We have been having High's in the 50's and lows in the 20's at night. The morning that this happened it was about 36 F when this happened. (Only a cyclist would pay attention to this )

I had just stopped and removed my cycling vest because i was getting hot about a mile before getting to the spot where the individual was stranded. I was just wearing, tights, LS jersey, and nylon shell. It was a nice morning but i found it pretty odd that 2 teenagers would be up that early on a Saturday morning. It was even more odd that they would be on the water. Maybe OK for cycling but not what i would call good rafting weather, or water.