The dataset contains all material involved in figure4a, figure4b, figure5, figure6, figure7 and figure8. There are six data sheets in this xlsx file. Meteorological data acquired between 2013 and 2015 were used to investigate at Hangzhou. there are three key points: (1)Criteria to identify valley wind episodes from ground-based observations were proposed and evaluated. (2)Interactions between mountain–plain wind and urban breeze were found from surface observations.(3)The interaction can modulate the reversal times of diurnal mountain-plain winds. The data is including wind direction, wind speed and temperature with 5-min sampling. Every data sheet has a readme for a more detailed explanation, and you need to analyse them in combination with figures.