In this paper, the Typical Weather Year data for 25 main cities in China were developed for the purposes of building simulations. The source data are the observed weather data with the interval of three hours. First solar radiation is estimated with the total cloud cover, temperature, humidity and wind speed. The Typical Weather Year consists of 12 typical months. The typical months were selected with the average dry bulb temperature, dew point temperature, solar radiation and wind speed, as well as the cumulative distribution functions. The three-hour interval data were interpolated with the Fourier Analyses.
