Rabat makes for a wonderful winter getaway; temperatures are consistent throughout the year and even though winters barely exist, summers are far from scorching. Daily averages rarely dip under the sixties and nineties are equally rare. Rainfall occurs primarily between October and March, the bulk of precipitation coming down in the winter.
The busiest time of year for Moroccan tourism is the summer, though travelers come from France for spring break in April and from far and wide between Christmas and New Years.
That said, of the five-million-plus annual tourists to the country every year, half are checking in with family while the others mostly hit up the more popular areas of Marrakech , Casablanca , and Fez , leaving Rabat rather free of congestion no matter what the season.
source : www.tripadvisor.com