This difference can be easily noticed in the eastern region of Jordan, almost similar pattern of changes is kept for the third period of prediction (2009–2018). Fig. 5 also shows that the mean annual maximum temperature is high for all examined weather stations in the eastern desert regions, with mean maximum annual temperature of around 30.65 °C during the first decade (1979–1988), and then increased to 34.7 °C during the second decade (1989–1998).