Astroclimatology of Paranal

Cloudiness at Paranal

(Source: Paranal Night Reports and La Silla Team Reports)

Cloudiness Monthly Averages Graph and Data (1983-now) and since UT1 first light

Cloudiness differential Paranal-La Silla (1983-now)

Cloudiness seasonal distribution (1987-1995), (1983-2001).

Relationship to El-Nino : The ESO Messenger 90, December 97 (ps file)