Vehicle control system and method, and vehicle including the same

An apparatus for controlling autonomous driving of a vehicle is introduced. The apparatus may comprise at least one communication circuit configured to communicate with an external device, and a processor configured to identify, based on information provided through the at least one communication circuit, an average speed and atmospheric pressure change on a driving path of the vehicle, determine, based on the atmospheric pressure change and an atmospheric pressure change limit value, a speed limit, output, based on the average speed and the speed limit, a vehicle speed control value, and control, based on the output vehicle speed control value, autonomous driving of the vehicle.