Not El Ghouna, but in Sharm last Christmas it was about 24 degrees for most of Christmas week. Mornings were chilly out of the sun, but we ate breakfast outside every day (all the local had anoraks on!). It get's dark about 7pm and the evenings were chilly so take some long trousers and a fleece!
We go away at Christmas but can only go for a week so long haul is out - I'd hate to sit on a plane for 12 hours for just a week's stay. We love India, but visa fees and malaria tablets aren't worth it for just a week plus it's a long flight.
We set a limit of a maximum flight of 7 hours and a modest budget. Dubai would be great at Christmas but flights are very expensive as it's a scheduled service only. The warmest place within our 7 hour rule would be The Gambia, but this doesn't appeal. So far we have been to Madeira and Egypt, other option would be the Canaries, but this doesn't appeal either! This year it looks like we are going back to Madeira.