One of the most effective measures of reducing the pollution in cities is represented by public transportation. The effect is increased when zero emission vehicles such as tram, trolleybus and electric bus are used. For routes that are not busy enough or cannot accommodate the supplementary infrastructure, an electric bus can be a good solution for zero emission public transportation. The energy consumption of an electric urban bus can vary significantly depending on different parameters like exterior temperature, number of passengers, number of stops as well as traffic. An estimation of the energy consumption in real traffic conditions can help operators to plan the charging needs, thus increasing the profitability of the investment while reducing the grid pressure. A unique driving cycle is difficult to create as each use case of the bus itself is different from one city to another or from one route to another. This paper aims to model an electric urban bus using Simulink and to simulate the energy consumption in real traffic conditions based on recorded data for two bus routes and different traffic conditions.