Andalusia is one of Spain’s best regions for astronomy. Cloud detectors installed in the observatory show that in the period from October 2020 to August 2021 there were 63% of nights with clear skies. In the period from April to August 2021, it was 85%.
Instead of citing different technical parameters, I think it is easier to look at the photos taken at the observatory.
Sample video from the AllSky camera on FaceBook.