Temperature in the Sahara

I am trying to find out what to expect for high (day) and low (night) temperatures for a camel trek out of M'hamid in mid/late November. Yes, I've tried the regular sites first - weather.com, yahoo weather, etc., and they do not have info for the desert. Thanks!

In Zagora, November average hi, 70; average low, 47.
Early in the month average hi 74, then 66 by end of November. Average lows during same periods, 51 to 43 by end of month. Source: msn weather.