In this research, we predict extreme temperatures using the decadal climate prediction project (DCPP) for the next decade over Iran. For this purpose, three DCPP models for two time periods including Hindcast (1981-2019) and Forecast (2021-2028) were used. We used the Delta Change Factor (DCF) and the independence weighted mean (IWM) methods to correct the bias and generate a multi-model ensemble. Temperature indices provided by ETCCDI including Mean Daily Mean Temperature (TMm), Mean Daily Minimum Temperature (TNm), Mean Daily Maximum Temperature (TXm) and Warm Spell Duration Index (WSDI) were calculated. The result showed an increasing trend in temperature extremes in the next decade. The north of Iran, Zagros mountains and northeast experience higher temperatures against the Hindcast period. Among the studied indicators, the WSDI variations will be more prominent. This index will increase from 10 days in the Hindcast period (1981-2019) to 24 days by 2028.