One experiment was carried out to verify the influence of 20, 25 and 30°C on the performance of seed germination of Stevia (Stevia rebaudiana (Bert.) Bertoni). The data sets from cumulative frequencies, at each 12 hours, were combined with the cumulative distribution of Weibull with three parameters. The best performance was verified at 25°C. The seeds took 101.36 hours to germinate 63.21% of the maximum. The performance of the parameters of the cumulative distribution of Weibull was dose to linearity in temperatures of 20 and 25°C and reasonably dose to linearity in temperatures of 30°C. In this case, the had assimetry and a high percentage of bias.