Its easy to forget about da gubbermen holidays when you gotta go to work today but if you don't know what Sock-it-to-me is, that water could be PRETTY COLD after a flip! "Lotsawater" could be a prophetic moniker...
Better take a couple of thermos full of hot chocolate and warm change of dry clothes for everyone on your trip. With short days, cold water and cold air temps, there's not much margin for error. Plan accordingly.
High temp forecast is 61 for Moab http://wwwa.accuweather.com/forecast...84532&metric=0
The day may be a bit brisk, especially when the breeze comes up on the long flatwater float out, if folks aren't in dry gear by then.