In this research, temporal trends and change points in heating degree-days (HDD), cooling (CDD), their simultaneous combination (HDD + CDD) were analysed for a 60-year period (1960–2019) Iran. The results show that less than 20% of the study stations had significant (either upward or downward) HDD time series, while more 80% increasing CDD series. Abrupt changes series mostly occurred early 198...