Astroclimatology of ESO Sites	ATACAMA WORKSHOP, Ithaca NY M. Sarazin, June 15-17 2000, 4/14

Monthly mean seeing at Paranal (24 40'S) and La Silla (29 15'S) since the beginning of the VLT site survey: Seeing, measured by a Differential Image Monitor (DIMM) at 6m above ground, is given for 0.5 micron and zenith observation.