The wireless Internet of Things (IoT) is the future of Internet technologies in which every object around us will be connected using some kind of network to every other object, and they will have the capability to send and receive data from them. IoT will trigger a large range of use cases. One interesting and prominent use case is Vehicle-to-Everything (V2X) communications, which aim at revolutionizing the travelling experience especially within a smart city. The connected vehicles enable the exchange of information between the vehicle and its surroundings via the IoT. V2X communications face great challenges due to the special features in mobility, such as high mobility, frequent topology changes. Hence, as vehicles move in and out of the coverage areas of other vehicles, Wi-Fi and cellular base stations, and change their communication Point of Attachment (PoA), mobility management aims to provide a seamless communication by efficient handover strategies and Radio Access Technology (RAT) selection schemes. In this paper, we present a novel multi-criteria handover algorithm to select the best RAT for V2X communications. Fuzzy logic system is used to decide whether a target candidate is suitable for handover. The efficiency of our mechanism is evaluated through appropriate simulation by using OMNET++, SUMO and VeinsLTE framework. The properties of our mechanism satisfy the service continuity requirements while decreasing the V2V handover failure rate and the handover failure rate mode switch.