In the present paper, the Weibull distribution is used to analyze the wind speed data of Liptovský Mikuláš (49°05'03'' N, 19°36'08'' E), situated in northern Slovakia. Analyzed wind speed data was collected over 11-year period (2005-2015) and was measured three times a day. The results show that the seasonal values of the shape parameter  range from 1,474 to 1,607, with yearly value of 1,546 while the seasonal values of the scale parameter  range from 2,488 to 3,010 m/s, with yearly value of 2,726 m/s. We find out that according to the coefficient of determination and root mean square error, the Weibull distribution performs well in fitting the wind speed data.