Abstract: In this paper, the changes of frequency and intensity of extreme temperature and precipitation events were analyzed using 8 extreme temperature indices and 5 extreme precipitation indices based on the daily temperature and precipitation data observed by 17 meteorological stations in Shijiazhuang during the period of 1972-2009. Results showed that warm days tended to increase, but cold days, frost days and ice days tended to decrease, especially there was a significant decrease of cold days and frost days. The increase of warm indices and the decrease of cold indices were the most significant at the stations in the eastern part of the study area. There was a slight increase of extreme maximum and minimum temperature, and also a significant increase trend of annual lowest values of maximum temperature and the highest values of minimum temperature. The spatial distribution of 4 extreme temperature indices was quite different, and there was a slight increase of heavy rain days and rainstorm days. There was also a slight increase of maximum 1-day and 3-day precipitation, but such trend was not significant at most stations. The linear trend of rainstorm intensity was only 0.83 mm/（d·10 a）, and the increase or decrease trend of heavy rain intensity accorded with that of rainstorm at most stations.

Key words: extreme temperature, extreme precipitation, trend, spatial distribution, climate change, Shijiazhuang