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This paper describes the potential of wind in Medan, North Sumatra, which can be used as one of the friendly energy resources as wind power plant. The method used in analysis of wind speed characteritistic is the Weibull distribution method. This method has proven its accuracy in terms of its ability to determine the best value. Presentation of data for 3 years from 2008 to 2010 with an average wind speed of 3.159273 m/s and average air humadity as 80.22 and probability of each 0,3386 %. The results show that from January to April and October to December, the potential of wind speed is likely to be used as wind power plant, but besides these months on a low wind speed has a very low even that it is not likely to be used as power plant and standard deviation average at 0.304333. [ABSTRACT FROM AUTHOR]