This paper aims to examine spatio-temporal variability during the production of the lingual consonants /t, d, s, z, k, g l, n, XXX/ in a sample of Greek spontaneous speech. It provides a description of the range of segmental variability and explores the relationship between articulatory and temporal variability. It also discusses instances of common connected speech processes including assimilations and deletions. Data from two Greek speakers producing a monologue was recorded with the technique of electropalatography (Reading EPG system). The results indicated that segmental variability ranges over a continuum from over-articulated to under-articulated forms, i.e. fully articulated tokens to very open articulations. In addition, duration dependent variability was found to be a function of the production characteristics of the consonant. Evidence of both gradient and categorical changes in spontaneous speech were suggested by the data and are discussed with reference to current theoretical frameworks.