The purpose of this study is to make regional climate atlas in Osaka region for suggesting the pro-environmental urban planning. Three points were concerned; long-term analysis of urban climate, use of observed data and meso-scale numerical calculation and making method of regional climate atlas. For first point, the observed data was used and the calculation period was set for a month, August 2006 using WRF model. To represent the result of long-term analysis, the distribution of degree-hour and averaged wind speed and the wind rose were made. Consequently, the climate atlas represents the difference of the characteristic of urban climate.