Mean annual rainfall in the catchment totals 300–600 mm and follows a strong orographic gradient. Temperature averages around 17°C. January is the month reviewing the lowest rainfall amount, while June is the wettest month. Concomitantly June and July are the coldest month, monthly temperature averages around 12°C. Thus, the climate is classified as a typical Mediterranean-type winter rainfall climate with mild winters. The climate is classified as Csa following Köppen and Geiger.
Most of the year – especially in the growing season – evaporations exceeds rainfall.