In this paper, we introduce a retrospective weather data set for Hong Kong for the two years July 2019 to June 2021 with 200m resolution using CPAS. We verified that the result is better than the fifth-generation ECMWF atmospheric reanalysis of the global climate data (ERA5), which is of about 28km resolution over Hong Kong. The reduction of mean absolute error for hourly temperature and 10-minute instantaneous wind speed over ERA5 are 19.4% and 28.2% respectively.