How cold does Wadi Rum get at night?

How cold does Wadi Rum get at night? - 1st Oct 2008 - 10:43pm
Trip - Petra & the Pyramids, Departure Date - October 13
I'm going on Petra & the Pyramids departing October 13 and wonder how cold it's likely to get at night, so I know how heavy a sleeping bag to take along (hate to take up too much room in my luggage!). Does anybody have any experience with this?


