If its anything like Morocco it will be dry, sometimes partly cloudy, often a slight breeze off the sea and anything from 10 - 15 degrees celsius. But quite cool at night, pack warm clothes for the evenings. Me and my girlfriend at the time had to use up leave before the end of Jan and we thought the only place that was guaranteed sun was Tunisia, Morocco, Egypt. Got a good deal and had a very enjoyable week. It isnt quite shorts and a vest weather but we had no rain and still got a nice tan!