**5. Conclusions**

In the present work an objective definition of 12 climatologically homogeneous areas in the southern Balkans has been carried out for the 10-year period of 2008 to 2017 with the use of 0.25◦ × 0.25◦ ERA5 meteorological data and the following main conclusions can be drawn.


**Author Contributions:** Conceptualization, C.J.L.; Methodology, C.J.L. and G.K.; Data Curation, G.K.; Writing—Original draft preparation, C.J.L.; Writing—Review and editing, C.J.L., G.K., and A.B.; Visualization, G.K.; Supervision, A.B.

**Funding:** This research received no external funding.

**Acknowledgments:** Acknowledgement is made for the use of ECMWF's computing and archive facilities in this research, generated using Copernicus Climate Change Service information [2018].

**Conflicts of Interest:** The authors declare no conflicts of interest.
