The increase in extreme weather events is a consequence of climate change and can no longer be denied.. Many reports and studies have already dealt with this issue in order to define extreme events, and predict their impact. The aim of this work was to find out by means of selected extreme indices for the climate parameters of temperature and precipitation, whether there is in the ?Suedoststeiermark?, a flat to hilly region, an increased occurrence of extreme weather events. For the analysis we had data from five climate stations, Bad Gleichenberg, Gleisdorf, Graz Airport, Graz University and Schöckl. The mountain station Schöckl provides a good contrast to the four stations situated in the plains. The observation period 1948-2007 of at least three measuring stations enables a more robust analysis. The results obtained show for temperature values, despite a partly high variability, that an increase in maximum temperatures and a decrease in minimum temperatures has occured. Above all, the 90% percentile of the temperature minimum and temperature maximum and the already observed increase in annual mean by KABAS (2005) have a positively significant trend. The results of the rainfall indices could be observed to show higher variability than the temperature, but they show no significant trend development so far. The annual total rainfall diminishes at all stations, and the dry periods are getting longer.